diff --git a/CHANGELOG.md b/CHANGELOG.md
index a8d1cb7ff..aa1b47247 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,39 @@
+<a name="0.8.27"></a>
+## [0.8.27](https://github.com/angular/zone.js/compare/v0.8.26...0.8.27) (2019-01-08)
+
+
+### Bug Fixes
+
+* **bluebird:** fix [#1112](https://github.com/angular/zone.js/issues/1112), bluebird chained callback should return a Bluebird Promise ([#1114](https://github.com/angular/zone.js/issues/1114)) ([6ba3169](https://github.com/angular/zone.js/commit/6ba3169))
+* **core:** fix [#1108](https://github.com/angular/zone.js/issues/1108), window.onerror should have (message, source, lineno, colno, error) signiture ([#1109](https://github.com/angular/zone.js/issues/1109)) ([49e0548](https://github.com/angular/zone.js/commit/49e0548))
+* **core:** fix [#1153](https://github.com/angular/zone.js/issues/1153), ZoneTask.toString should always be a string ([#1166](https://github.com/angular/zone.js/issues/1166)) ([afa1363](https://github.com/angular/zone.js/commit/afa1363))
+* **core:** fix interval will still run after cancelled error ([#1156](https://github.com/angular/zone.js/issues/1156)) ([eb72ff4](https://github.com/angular/zone.js/commit/eb72ff4))
+* **core:** use then directly when promise is not patchable ([#1079](https://github.com/angular/zone.js/issues/1079)) ([d7e0a31](https://github.com/angular/zone.js/commit/d7e0a31))
+* **duplicate:** fix [#1081](https://github.com/angular/zone.js/issues/1081), load patch should also check the duplicate flag ([#1121](https://github.com/angular/zone.js/issues/1121)) ([8ce5e33](https://github.com/angular/zone.js/commit/8ce5e33))
+* **event:** fix [#1110](https://github.com/angular/zone.js/issues/1110), nodejs EventEmitter should support Symbol eventName ([#1113](https://github.com/angular/zone.js/issues/1113)) ([96420d6](https://github.com/angular/zone.js/commit/96420d6))
+* **event:** should pass boolean to addEventListener if not support passive ([#1053](https://github.com/angular/zone.js/issues/1053)) ([e9536ec](https://github.com/angular/zone.js/commit/e9536ec))
+* **format:** update clang-format to 1.2.3 ([f238908](https://github.com/angular/zone.js/commit/f238908))
+* **memory:** Add protection against excessive on prop patching ([#1106](https://github.com/angular/zone.js/issues/1106)) ([875086f](https://github.com/angular/zone.js/commit/875086f))
+* **node:** fix [#1164](https://github.com/angular/zone.js/issues/1164), don't patch uncaughtException to prevent endless loop ([#1170](https://github.com/angular/zone.js/issues/1170)) ([33a0ad6](https://github.com/angular/zone.js/commit/33a0ad6))
+* **node:** node patched method should copy original delegate's symbol properties ([#1095](https://github.com/angular/zone.js/issues/1095)) ([0a2f6ff](https://github.com/angular/zone.js/commit/0a2f6ff))
+* **onProperty:** user quoted access for __Zone_ignore_on_properties ([#1134](https://github.com/angular/zone.js/issues/1134)) ([7201d44](https://github.com/angular/zone.js/commit/7201d44))
+* **test:** karma-dist should test bundle under dist ([#1049](https://github.com/angular/zone.js/issues/1049)) ([0720d79](https://github.com/angular/zone.js/commit/0720d79))
+* **tsc:** tsconfig.json strict:true ([915042d](https://github.com/angular/zone.js/commit/915042d))
+* **xhr:** fix [#1072](https://github.com/angular/zone.js/issues/1072), should set scheduled flag to target ([#1074](https://github.com/angular/zone.js/issues/1074)) ([34c12e5](https://github.com/angular/zone.js/commit/34c12e5))
+* **xhr:** should invoke xhr task after onload is triggered ([#1055](https://github.com/angular/zone.js/issues/1055)) ([2aab9c8](https://github.com/angular/zone.js/commit/2aab9c8))
+
+
+### Features
+
+* **build:** Upgrade to TypeScript 2.9 and rxjs6 ([#1122](https://github.com/angular/zone.js/issues/1122)) ([31fc127](https://github.com/angular/zone.js/commit/31fc127))
+* **core:** upgrade to typescript 3.0.3 ([#1132](https://github.com/angular/zone.js/issues/1132)) ([60adc9c](https://github.com/angular/zone.js/commit/60adc9c))
+* **Core:** fix [#910](https://github.com/angular/zone.js/issues/910), add a flag to allow user to ignore duplicate Zone error ([#1093](https://github.com/angular/zone.js/issues/1093)) ([a86c6d5](https://github.com/angular/zone.js/commit/a86c6d5))
+* **custom-element:** patch customElement v1 APIs ([#1133](https://github.com/angular/zone.js/issues/1133)) ([427705f](https://github.com/angular/zone.js/commit/427705f))
+* **error:** fix [#975](https://github.com/angular/zone.js/issues/975), can config how to load blacklist zone stack frames ([#1045](https://github.com/angular/zone.js/issues/1045)) ([ff3d545](https://github.com/angular/zone.js/commit/ff3d545))
+* **fetch:** schedule macroTask when fetch ([#1075](https://github.com/angular/zone.js/issues/1075)) ([bf88c34](https://github.com/angular/zone.js/commit/bf88c34))
+
+
+
 <a name="0.8.26"></a>
 ## [0.8.26](https://github.com/angular/zone.js/compare/v0.8.25...0.8.26) (2018-04-08)
 
diff --git a/dist/fake-async-test.js b/dist/fake-async-test.js
index 9bc27674e..348de8d0f 100644
--- a/dist/fake-async-test.js
+++ b/dist/fake-async-test.js
@@ -154,7 +154,11 @@ var __spread = (undefined && undefined.__spread) || function () {
                     }
                 }
             }
+            lastCurrentTime = this._currentTime;
             this._currentTime = finalTime;
+            if (doTick) {
+                doTick(this._currentTime - lastCurrentTime);
+            }
         };
         Scheduler.prototype.flush = function (limit, flushPeriodic, doTick) {
             if (limit === void 0) { limit = 20; }
@@ -243,14 +247,14 @@ var __spread = (undefined && undefined.__spread) || function () {
                     args[_i] = arguments[_i];
                 }
                 fn.apply(global, args);
-                if (_this._lastError === null) {
+                if (_this._lastError === null) { // Success
                     if (completers.onSuccess != null) {
                         completers.onSuccess.apply(global);
                     }
                     // Flush microtasks only on success.
                     _this.flushMicrotasks();
                 }
-                else {
+                else { // Failure
                     if (completers.onError != null) {
                         completers.onError.apply(global);
                     }
@@ -549,23 +553,23 @@ Zone.__load_patch('fakeasync', function (global, Zone, api) {
         ProxyZoneSpec && ProxyZoneSpec.assertPresent().resetDelegate();
     }
     /**
-    * Wraps a function to be executed in the fakeAsync zone:
-    * - microtasks are manually executed by calling `flushMicrotasks()`,
-    * - timers are synchronous, `tick()` simulates the asynchronous passage of time.
-    *
-    * If there are any pending timers at the end of the function, an exception will be thrown.
-    *
-    * Can be used to wrap inject() calls.
-    *
-    * ## Example
-    *
-    * {@example core/testing/ts/fake_async.ts region='basic'}
-    *
-    * @param fn
-    * @returns The function wrapped to be executed in the fakeAsync zone
-    *
-    * @experimental
-    */
+     * Wraps a function to be executed in the fakeAsync zone:
+     * - microtasks are manually executed by calling `flushMicrotasks()`,
+     * - timers are synchronous, `tick()` simulates the asynchronous passage of time.
+     *
+     * If there are any pending timers at the end of the function, an exception will be thrown.
+     *
+     * Can be used to wrap inject() calls.
+     *
+     * ## Example
+     *
+     * {@example core/testing/ts/fake_async.ts region='basic'}
+     *
+     * @param fn
+     * @returns The function wrapped to be executed in the fakeAsync zone
+     *
+     * @experimental
+     */
     function fakeAsync(fn) {
         // Not using an arrow function to preserve context passed from call site
         return function () {
diff --git a/dist/proxy.js b/dist/proxy.js
index 5766ee978..d2535215a 100644
--- a/dist/proxy.js
+++ b/dist/proxy.js
@@ -23,6 +23,7 @@ var ProxyZoneSpec = /** @class */ (function () {
         if (defaultSpecDelegate === void 0) { defaultSpecDelegate = null; }
         this.defaultSpecDelegate = defaultSpecDelegate;
         this.name = 'ProxyZone';
+        this._delegateSpec = null;
         this.properties = { 'ProxyZoneSpec': this };
         this.propertyKeys = null;
         this.lastTaskState = null;
diff --git a/dist/proxy.min.js b/dist/proxy.min.js
index c0c44d725..2d4c72c21 100644
--- a/dist/proxy.min.js
+++ b/dist/proxy.min.js
@@ -1 +1 @@
-!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t():"function"==typeof define&&define.amd?define(t):t()}(this,function(){"use strict";var e=function(){function e(e){void 0===e&&(e=null),this.defaultSpecDelegate=e,this.name="ProxyZone",this.properties={ProxyZoneSpec:this},this.propertyKeys=null,this.lastTaskState=null,this.isNeedToTriggerHasTask=!1,this.tasks=[],this.setDelegate(e)}return e.get=function(){return Zone.current.get("ProxyZoneSpec")},e.isLoaded=function(){return e.get()instanceof e},e.assertPresent=function(){if(!e.isLoaded())throw new Error("Expected to be running in 'ProxyZone', but it was not found.");return e.get()},e.prototype.setDelegate=function(e){var t=this,s=this._delegateSpec!==e;this._delegateSpec=e,this.propertyKeys&&this.propertyKeys.forEach(function(e){return delete t.properties[e]}),this.propertyKeys=null,e&&e.properties&&(this.propertyKeys=Object.keys(e.properties),this.propertyKeys.forEach(function(s){return t.properties[s]=e.properties[s]})),s&&this.lastTaskState&&(this.lastTaskState.macroTask||this.lastTaskState.microTask)&&(this.isNeedToTriggerHasTask=!0)},e.prototype.getDelegate=function(){return this._delegateSpec},e.prototype.resetDelegate=function(){this.getDelegate();this.setDelegate(this.defaultSpecDelegate)},e.prototype.tryTriggerHasTask=function(e,t,s){this.isNeedToTriggerHasTask&&this.lastTaskState&&(this.isNeedToTriggerHasTask=!1,this.onHasTask(e,t,s,this.lastTaskState))},e.prototype.removeFromTasks=function(e){if(this.tasks)for(var t=0;t<this.tasks.length;t++)if(this.tasks[t]===e)return void this.tasks.splice(t,1)},e.prototype.getAndClearPendingTasksInfo=function(){if(0===this.tasks.length)return"";var e=this.tasks.map(function(e){var t=e.data&&Object.keys(e.data).map(function(t){return t+":"+e.data[t]}).join(",");return"type: "+e.type+", source: "+e.source+", args: {"+t+"}"}),t="--Pendng async tasks are: ["+e+"]";return this.tasks=[],t},e.prototype.onFork=function(e,t,s,n){return this._delegateSpec&&this._delegateSpec.onFork?this._delegateSpec.onFork(e,t,s,n):e.fork(s,n)},e.prototype.onIntercept=function(e,t,s,n,o){return this._delegateSpec&&this._delegateSpec.onIntercept?this._delegateSpec.onIntercept(e,t,s,n,o):e.intercept(s,n,o)},e.prototype.onInvoke=function(e,t,s,n,o,r,a){return this.tryTriggerHasTask(e,t,s),this._delegateSpec&&this._delegateSpec.onInvoke?this._delegateSpec.onInvoke(e,t,s,n,o,r,a):e.invoke(s,n,o,r,a)},e.prototype.onHandleError=function(e,t,s,n){return this._delegateSpec&&this._delegateSpec.onHandleError?this._delegateSpec.onHandleError(e,t,s,n):e.handleError(s,n)},e.prototype.onScheduleTask=function(e,t,s,n){return"eventTask"!==n.type&&this.tasks.push(n),this._delegateSpec&&this._delegateSpec.onScheduleTask?this._delegateSpec.onScheduleTask(e,t,s,n):e.scheduleTask(s,n)},e.prototype.onInvokeTask=function(e,t,s,n,o,r){return"eventTask"!==n.type&&this.removeFromTasks(n),this.tryTriggerHasTask(e,t,s),this._delegateSpec&&this._delegateSpec.onInvokeTask?this._delegateSpec.onInvokeTask(e,t,s,n,o,r):e.invokeTask(s,n,o,r)},e.prototype.onCancelTask=function(e,t,s,n){return"eventTask"!==n.type&&this.removeFromTasks(n),this.tryTriggerHasTask(e,t,s),this._delegateSpec&&this._delegateSpec.onCancelTask?this._delegateSpec.onCancelTask(e,t,s,n):e.cancelTask(s,n)},e.prototype.onHasTask=function(e,t,s,n){this.lastTaskState=n,this._delegateSpec&&this._delegateSpec.onHasTask?this._delegateSpec.onHasTask(e,t,s,n):e.hasTask(s,n)},e}();Zone.ProxyZoneSpec=e});
\ No newline at end of file
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t():"function"==typeof define&&define.amd?define(t):t()}(this,function(){"use strict";var e=function(){function e(e){void 0===e&&(e=null),this.defaultSpecDelegate=e,this.name="ProxyZone",this._delegateSpec=null,this.properties={ProxyZoneSpec:this},this.propertyKeys=null,this.lastTaskState=null,this.isNeedToTriggerHasTask=!1,this.tasks=[],this.setDelegate(e)}return e.get=function(){return Zone.current.get("ProxyZoneSpec")},e.isLoaded=function(){return e.get()instanceof e},e.assertPresent=function(){if(!e.isLoaded())throw new Error("Expected to be running in 'ProxyZone', but it was not found.");return e.get()},e.prototype.setDelegate=function(e){var t=this,s=this._delegateSpec!==e;this._delegateSpec=e,this.propertyKeys&&this.propertyKeys.forEach(function(e){return delete t.properties[e]}),this.propertyKeys=null,e&&e.properties&&(this.propertyKeys=Object.keys(e.properties),this.propertyKeys.forEach(function(s){return t.properties[s]=e.properties[s]})),s&&this.lastTaskState&&(this.lastTaskState.macroTask||this.lastTaskState.microTask)&&(this.isNeedToTriggerHasTask=!0)},e.prototype.getDelegate=function(){return this._delegateSpec},e.prototype.resetDelegate=function(){this.getDelegate();this.setDelegate(this.defaultSpecDelegate)},e.prototype.tryTriggerHasTask=function(e,t,s){this.isNeedToTriggerHasTask&&this.lastTaskState&&(this.isNeedToTriggerHasTask=!1,this.onHasTask(e,t,s,this.lastTaskState))},e.prototype.removeFromTasks=function(e){if(this.tasks)for(var t=0;t<this.tasks.length;t++)if(this.tasks[t]===e)return void this.tasks.splice(t,1)},e.prototype.getAndClearPendingTasksInfo=function(){if(0===this.tasks.length)return"";var e=this.tasks.map(function(e){var t=e.data&&Object.keys(e.data).map(function(t){return t+":"+e.data[t]}).join(",");return"type: "+e.type+", source: "+e.source+", args: {"+t+"}"}),t="--Pendng async tasks are: ["+e+"]";return this.tasks=[],t},e.prototype.onFork=function(e,t,s,n){return this._delegateSpec&&this._delegateSpec.onFork?this._delegateSpec.onFork(e,t,s,n):e.fork(s,n)},e.prototype.onIntercept=function(e,t,s,n,o){return this._delegateSpec&&this._delegateSpec.onIntercept?this._delegateSpec.onIntercept(e,t,s,n,o):e.intercept(s,n,o)},e.prototype.onInvoke=function(e,t,s,n,o,r,a){return this.tryTriggerHasTask(e,t,s),this._delegateSpec&&this._delegateSpec.onInvoke?this._delegateSpec.onInvoke(e,t,s,n,o,r,a):e.invoke(s,n,o,r,a)},e.prototype.onHandleError=function(e,t,s,n){return this._delegateSpec&&this._delegateSpec.onHandleError?this._delegateSpec.onHandleError(e,t,s,n):e.handleError(s,n)},e.prototype.onScheduleTask=function(e,t,s,n){return"eventTask"!==n.type&&this.tasks.push(n),this._delegateSpec&&this._delegateSpec.onScheduleTask?this._delegateSpec.onScheduleTask(e,t,s,n):e.scheduleTask(s,n)},e.prototype.onInvokeTask=function(e,t,s,n,o,r){return"eventTask"!==n.type&&this.removeFromTasks(n),this.tryTriggerHasTask(e,t,s),this._delegateSpec&&this._delegateSpec.onInvokeTask?this._delegateSpec.onInvokeTask(e,t,s,n,o,r):e.invokeTask(s,n,o,r)},e.prototype.onCancelTask=function(e,t,s,n){return"eventTask"!==n.type&&this.removeFromTasks(n),this.tryTriggerHasTask(e,t,s),this._delegateSpec&&this._delegateSpec.onCancelTask?this._delegateSpec.onCancelTask(e,t,s,n):e.cancelTask(s,n)},e.prototype.onHasTask=function(e,t,s,n){this.lastTaskState=n,this._delegateSpec&&this._delegateSpec.onHasTask?this._delegateSpec.onHasTask(e,t,s,n):e.hasTask(s,n)},e}();Zone.ProxyZoneSpec=e});
\ No newline at end of file
diff --git a/dist/webapis-media-query.js b/dist/webapis-media-query.js
index d81601b7d..a0450a507 100644
--- a/dist/webapis-media-query.js
+++ b/dist/webapis-media-query.js
@@ -69,7 +69,7 @@ Zone.__load_patch('mediaQuery', function (global, Zone, api) {
                     patchRemoveListener(mql);
                 }
                 else if (mql['addListener']) {
-                    // proto not exists, or proto has no addListener method 
+                    // proto not exists, or proto has no addListener method
                     // try to patch mql instance
                     patchAddListener(mql);
                     patchRemoveListener(mql);
diff --git a/dist/wtf.js b/dist/wtf.js
index 9b4968279..dfea9d170 100644
--- a/dist/wtf.js
+++ b/dist/wtf.js
@@ -47,9 +47,10 @@
             return retValue;
         };
         WtfZoneSpec.prototype.onInvoke = function (parentZoneDelegate, currentZone, targetZone, delegate, applyThis, applyArgs, source) {
-            var scope = WtfZoneSpec.invokeScope[source];
+            var src = source || 'unknown';
+            var scope = WtfZoneSpec.invokeScope[src];
             if (!scope) {
-                scope = WtfZoneSpec.invokeScope[source] =
+                scope = WtfZoneSpec.invokeScope[src] =
                     wtfEvents.createScope("Zone:invoke:" + source + "(ascii zone)");
             }
             return wtfTrace.leaveScope(scope(zonePathName(targetZone)), parentZoneDelegate.invoke(targetZone, delegate, applyThis, applyArgs, source));
@@ -88,7 +89,7 @@
             instance(zonePathName(targetZone), shallowObj(task.data, 2));
             return retValue;
         };
-        WtfZoneSpec.forkInstance = wtfEnabled && wtfEvents.createInstance('Zone:fork(ascii zone, ascii newZone)');
+        WtfZoneSpec.forkInstance = wtfEnabled ? wtfEvents.createInstance('Zone:fork(ascii zone, ascii newZone)') : null;
         WtfZoneSpec.scheduleInstance = {};
         WtfZoneSpec.cancelInstance = {};
         WtfZoneSpec.invokeScope = {};
@@ -96,7 +97,7 @@
         return WtfZoneSpec;
     }());
     function shallowObj(obj, depth) {
-        if (!depth)
+        if (!obj || !depth)
             return null;
         var out = {};
         for (var key in obj) {
@@ -118,10 +119,10 @@
     }
     function zonePathName(zone) {
         var name = zone.name;
-        zone = zone.parent;
-        while (zone != null) {
-            name = zone.name + '::' + name;
-            zone = zone.parent;
+        var localZone = zone.parent;
+        while (localZone != null) {
+            name = localZone.name + '::' + name;
+            localZone = localZone.parent;
         }
         return name;
     }
diff --git a/dist/wtf.min.js b/dist/wtf.min.js
index 32c1f633e..ae6905708 100644
--- a/dist/wtf.min.js
+++ b/dist/wtf.min.js
@@ -1 +1 @@
-!function(e,n){"object"==typeof exports&&"undefined"!=typeof module?n():"function"==typeof define&&define.amd?define(n):n()}(this,function(){"use strict";!function(e){function n(e,o){if(!o)return null;var t={};for(var c in e)if(e.hasOwnProperty(c)){var a=e[c];switch(typeof a){case"object":var r=a&&a.constructor&&a.constructor.name;a=r==Object.name?n(a,o-1):r;break;case"function":a=a.name||void 0}t[c]=a}return t}function o(e){var n=e.name;for(e=e.parent;null!=e;)n=e.name+"::"+n,e=e.parent;return n}var t=null,c=null,a=function(){var n=e.wtf;return!(!n||!(t=n.trace))&&(c=t.events,!0)}(),r=function(){function e(){this.name="WTF"}return e.prototype.onFork=function(n,t,c,a){var r=n.fork(c,a);return e.forkInstance(o(c),r.name),r},e.prototype.onInvoke=function(n,a,r,i,s,u,f){var p=e.invokeScope[f];return p||(p=e.invokeScope[f]=c.createScope("Zone:invoke:"+f+"(ascii zone)")),t.leaveScope(p(o(r)),n.invoke(r,i,s,u,f))},e.prototype.onHandleError=function(e,n,o,t){return e.handleError(o,t)},e.prototype.onScheduleTask=function(t,a,r,i){var s=i.type+":"+i.source,u=e.scheduleInstance[s];u||(u=e.scheduleInstance[s]=c.createInstance("Zone:schedule:"+s+"(ascii zone, any data)"));var f=t.scheduleTask(r,i);return u(o(r),n(i.data,2)),f},e.prototype.onInvokeTask=function(n,a,r,i,s,u){var f=i.source,p=e.invokeTaskScope[f];return p||(p=e.invokeTaskScope[f]=c.createScope("Zone:invokeTask:"+f+"(ascii zone)")),t.leaveScope(p(o(r)),n.invokeTask(r,i,s,u))},e.prototype.onCancelTask=function(t,a,r,i){var s=i.source,u=e.cancelInstance[s];u||(u=e.cancelInstance[s]=c.createInstance("Zone:cancel:"+s+"(ascii zone, any options)"));var f=t.cancelTask(r,i);return u(o(r),n(i.data,2)),f},e.forkInstance=a&&c.createInstance("Zone:fork(ascii zone, ascii newZone)"),e.scheduleInstance={},e.cancelInstance={},e.invokeScope={},e.invokeTaskScope={},e}();Zone.wtfZoneSpec=a?new r:null}("object"==typeof window&&window||"object"==typeof self&&self||global)});
\ No newline at end of file
+!function(e,n){"object"==typeof exports&&"undefined"!=typeof module?n():"function"==typeof define&&define.amd?define(n):n()}(this,function(){"use strict";!function(e){function n(e,o){if(!e||!o)return null;var t={};for(var c in e)if(e.hasOwnProperty(c)){var a=e[c];switch(typeof a){case"object":var r=a&&a.constructor&&a.constructor.name;a=r==Object.name?n(a,o-1):r;break;case"function":a=a.name||void 0}t[c]=a}return t}function o(e){for(var n=e.name,o=e.parent;null!=o;)n=o.name+"::"+n,o=o.parent;return n}var t=null,c=null,a=function(){var n=e.wtf;return!(!n||!(t=n.trace))&&(c=t.events,!0)}(),r=function(){function e(){this.name="WTF"}return e.prototype.onFork=function(n,t,c,a){var r=n.fork(c,a);return e.forkInstance(o(c),r.name),r},e.prototype.onInvoke=function(n,a,r,i,s,u,f){var p=f||"unknown",l=e.invokeScope[p];return l||(l=e.invokeScope[p]=c.createScope("Zone:invoke:"+f+"(ascii zone)")),t.leaveScope(l(o(r)),n.invoke(r,i,s,u,f))},e.prototype.onHandleError=function(e,n,o,t){return e.handleError(o,t)},e.prototype.onScheduleTask=function(t,a,r,i){var s=i.type+":"+i.source,u=e.scheduleInstance[s];u||(u=e.scheduleInstance[s]=c.createInstance("Zone:schedule:"+s+"(ascii zone, any data)"));var f=t.scheduleTask(r,i);return u(o(r),n(i.data,2)),f},e.prototype.onInvokeTask=function(n,a,r,i,s,u){var f=i.source,p=e.invokeTaskScope[f];return p||(p=e.invokeTaskScope[f]=c.createScope("Zone:invokeTask:"+f+"(ascii zone)")),t.leaveScope(p(o(r)),n.invokeTask(r,i,s,u))},e.prototype.onCancelTask=function(t,a,r,i){var s=i.source,u=e.cancelInstance[s];u||(u=e.cancelInstance[s]=c.createInstance("Zone:cancel:"+s+"(ascii zone, any options)"));var f=t.cancelTask(r,i);return u(o(r),n(i.data,2)),f},e.forkInstance=a?c.createInstance("Zone:fork(ascii zone, ascii newZone)"):null,e.scheduleInstance={},e.cancelInstance={},e.invokeScope={},e.invokeTaskScope={},e}();Zone.wtfZoneSpec=a?new r:null}("object"==typeof window&&window||"object"==typeof self&&self||global)});
\ No newline at end of file
diff --git a/dist/zone-bluebird.js b/dist/zone-bluebird.js
index a6e118a2e..d73dac94a 100644
--- a/dist/zone-bluebird.js
+++ b/dist/zone-bluebird.js
@@ -37,8 +37,15 @@ Zone.__load_patch('bluebird', function (global, Zone, api) {
                         args[i] = function () {
                             var argSelf = this;
                             var argArgs = arguments;
-                            zone.scheduleMicroTask('Promise.then', function () {
-                                return func.apply(argSelf, argArgs);
+                            return new Bluebird(function (res, rej) {
+                                zone.scheduleMicroTask('Promise.then', function () {
+                                    try {
+                                        res(func.apply(argSelf, argArgs));
+                                    }
+                                    catch (error) {
+                                        rej(error);
+                                    }
+                                });
                             });
                         };
                     }
@@ -49,6 +56,16 @@ Zone.__load_patch('bluebird', function (global, Zone, api) {
                 return delegate.apply(self, args);
             }; });
         });
+        Bluebird.onPossiblyUnhandledRejection(function (e, promise) {
+            try {
+                Zone.current.runGuarded(function () {
+                    throw e;
+                });
+            }
+            catch (err) {
+                api.onUnhandledError(err);
+            }
+        });
         // override global promise
         global[api.symbol('ZoneAwarePromise')] = Bluebird;
     };
diff --git a/dist/zone-bluebird.min.js b/dist/zone-bluebird.min.js
index 9b3350fa9..4502c2f8c 100644
--- a/dist/zone-bluebird.min.js
+++ b/dist/zone-bluebird.min.js
@@ -1 +1 @@
-!function(n,e){"object"==typeof exports&&"undefined"!=typeof module?e():"function"==typeof define&&define.amd?define(e):e()}(this,function(){"use strict";Zone.__load_patch("bluebird",function(n,e,t){var o="bluebird";e[e.__symbol__(o)]=function(o){var i=["then","spread","finally"];i.forEach(function(n){t.patchMethod(o.prototype,n,function(n){return function(t,o){for(var i=e.current,r=function(n){var e=o[n];"function"==typeof e&&(o[n]=function(){var n=this,t=arguments;i.scheduleMicroTask("Promise.then",function(){return e.apply(n,t)})})},f=0;f<o.length;f++)r(f);return n.apply(t,o)}})}),n[t.symbol("ZoneAwarePromise")]=o}})});
\ No newline at end of file
+!function(n,t){"object"==typeof exports&&"undefined"!=typeof module?t():"function"==typeof define&&define.amd?define(t):t()}(this,function(){"use strict";Zone.__load_patch("bluebird",function(n,t,e){var o="bluebird";t[t.__symbol__(o)]=function(o){var r=["then","spread","finally"];r.forEach(function(n){e.patchMethod(o.prototype,n,function(n){return function(e,r){for(var i=t.current,c=function(n){var t=r[n];"function"==typeof t&&(r[n]=function(){var n=this,e=arguments;return new o(function(o,r){i.scheduleMicroTask("Promise.then",function(){try{o(t.apply(n,e))}catch(i){r(i)}})})})},u=0;u<r.length;u++)c(u);return n.apply(e,r)}})}),o.onPossiblyUnhandledRejection(function(n,o){try{t.current.runGuarded(function(){throw n})}catch(r){e.onUnhandledError(r)}}),n[e.symbol("ZoneAwarePromise")]=o}})});
\ No newline at end of file
diff --git a/dist/zone-error.js b/dist/zone-error.js
index 66f27ddab..f2f7eb702 100644
--- a/dist/zone-error.js
+++ b/dist/zone-error.js
@@ -35,8 +35,61 @@ Zone.__load_patch('Error', function (global, Zone, api) {
     // We must find the frame where Error was created, otherwise we assume we don't understand stack
     var zoneAwareFrame1;
     var zoneAwareFrame2;
+    var zoneAwareFrame1WithoutNew;
+    var zoneAwareFrame2WithoutNew;
+    var zoneAwareFrame3WithoutNew;
     global['Error'] = ZoneAwareError;
     var stackRewrite = 'stackRewrite';
+    var blackListedStackFramesPolicy = global['__Zone_Error_BlacklistedStackFrames_policy'] || 'default';
+    function buildZoneFrameNames(zoneFrame) {
+        var zoneFrameName = { zoneName: zoneFrame.zone.name };
+        var result = zoneFrameName;
+        while (zoneFrame.parent) {
+            zoneFrame = zoneFrame.parent;
+            var parentZoneFrameName = { zoneName: zoneFrame.zone.name };
+            zoneFrameName.parent = parentZoneFrameName;
+            zoneFrameName = parentZoneFrameName;
+        }
+        return result;
+    }
+    function buildZoneAwareStackFrames(originalStack, zoneFrame, isZoneFrame) {
+        if (isZoneFrame === void 0) { isZoneFrame = true; }
+        var frames = originalStack.split('\n');
+        var i = 0;
+        // Find the first frame
+        while (!(frames[i] === zoneAwareFrame1 || frames[i] === zoneAwareFrame2 ||
+            frames[i] === zoneAwareFrame1WithoutNew || frames[i] === zoneAwareFrame2WithoutNew ||
+            frames[i] === zoneAwareFrame3WithoutNew) &&
+            i < frames.length) {
+            i++;
+        }
+        for (; i < frames.length && zoneFrame; i++) {
+            var frame = frames[i];
+            if (frame.trim()) {
+                switch (blackListedStackFrames[frame]) {
+                    case 0 /* blackList */:
+                        frames.splice(i, 1);
+                        i--;
+                        break;
+                    case 1 /* transition */:
+                        if (zoneFrame.parent) {
+                            // This is the special frame where zone changed. Print and process it accordingly
+                            zoneFrame = zoneFrame.parent;
+                        }
+                        else {
+                            zoneFrame = null;
+                        }
+                        frames.splice(i, 1);
+                        i--;
+                        break;
+                    default:
+                        frames[i] += isZoneFrame ? " [" + zoneFrame.zone.name + "]" :
+                            " [" + zoneFrame.zoneName + "]";
+                }
+            }
+        }
+        return frames.join('\n');
+    }
     /**
      * This is ZoneAwareError which processes the stack frame and cleans up extra frames as well as
      * adds zone information to it.
@@ -49,43 +102,18 @@ Zone.__load_patch('Error', function (global, Zone, api) {
         var originalStack = error['originalStack'] = error.stack;
         // Process the stack trace and rewrite the frames.
         if (ZoneAwareError[stackRewrite] && originalStack) {
-            var frames_1 = originalStack.split('\n');
             var zoneFrame = api.currentZoneFrame();
-            var i = 0;
-            // Find the first frame
-            while (!(frames_1[i] === zoneAwareFrame1 || frames_1[i] === zoneAwareFrame2) &&
-                i < frames_1.length) {
-                i++;
+            if (blackListedStackFramesPolicy === 'lazy') {
+                // don't handle stack trace now
+                error[api.symbol('zoneFrameNames')] = buildZoneFrameNames(zoneFrame);
             }
-            for (; i < frames_1.length && zoneFrame; i++) {
-                var frame = frames_1[i];
-                if (frame.trim()) {
-                    switch (blackListedStackFrames[frame]) {
-                        case 0 /* blackList */:
-                            frames_1.splice(i, 1);
-                            i--;
-                            break;
-                        case 1 /* transition */:
-                            if (zoneFrame.parent) {
-                                // This is the special frame where zone changed. Print and process it accordingly
-                                zoneFrame = zoneFrame.parent;
-                            }
-                            else {
-                                zoneFrame = null;
-                            }
-                            frames_1.splice(i, 1);
-                            i--;
-                            break;
-                        default:
-                            frames_1[i] += " [" + zoneFrame.zone.name + "]";
-                    }
+            else if (blackListedStackFramesPolicy === 'default') {
+                try {
+                    error.stack = error.zoneAwareStack = buildZoneAwareStackFrames(originalStack, zoneFrame);
+                }
+                catch (e) {
+                    // ignore as some browsers don't allow overriding of stack
                 }
-            }
-            try {
-                error.stack = error.zoneAwareStack = frames_1.join('\n');
-            }
-            catch (e) {
-                // ignore as some browsers don't allow overriding of stack
             }
         }
         if (this instanceof NativeError && this.constructor != NativeError) {
@@ -110,6 +138,25 @@ Zone.__load_patch('Error', function (global, Zone, api) {
     ZoneAwareError.prototype = NativeError.prototype;
     ZoneAwareError[blacklistedStackFramesSymbol] = blackListedStackFrames;
     ZoneAwareError[stackRewrite] = false;
+    var zoneAwareStackSymbol = api.symbol('zoneAwareStack');
+    // try to define zoneAwareStack property when blackListed
+    // policy is delay
+    if (blackListedStackFramesPolicy === 'lazy') {
+        Object.defineProperty(ZoneAwareError.prototype, 'zoneAwareStack', {
+            configurable: true,
+            enumerable: true,
+            get: function () {
+                if (!this[zoneAwareStackSymbol]) {
+                    this[zoneAwareStackSymbol] = buildZoneAwareStackFrames(this.originalStack, this[api.symbol('zoneFrameNames')], false);
+                }
+                return this[zoneAwareStackSymbol];
+            },
+            set: function (newStack) {
+                this.originalStack = newStack;
+                this[zoneAwareStackSymbol] = buildZoneAwareStackFrames(this.originalStack, this[api.symbol('zoneFrameNames')], false);
+            }
+        });
+    }
     // those properties need special handling
     var specialPropertyNames = ['stackTraceLimit', 'captureStackTrace', 'prepareStackTrace'];
     // those properties of NativeError should be set to ZoneAwareError
@@ -175,50 +222,57 @@ Zone.__load_patch('Error', function (global, Zone, api) {
             };
         }
     });
+    if (blackListedStackFramesPolicy === 'disable') {
+        // don't need to run detectZone to populate
+        // blacklisted stack frames
+        return;
+    }
     // Now we need to populate the `blacklistedStackFrames` as well as find the
     // run/runGuarded/runTask frames. This is done by creating a detect zone and then threading
     // the execution through all of the above methods so that we can look at the stack trace and
     // find the frames of interest.
-    var ZONE_AWARE_ERROR = 'ZoneAwareError';
-    var ERROR_DOT = 'Error.';
-    var EMPTY = '';
-    var RUN_GUARDED = 'runGuarded';
-    var RUN_TASK = 'runTask';
-    var RUN = 'run';
-    var BRACKETS = '(';
-    var AT = '@';
     var detectZone = Zone.current.fork({
         name: 'detect',
         onHandleError: function (parentZD, current, target, error) {
             if (error.originalStack && Error === ZoneAwareError) {
-                var frames_2 = error.originalStack.split(/\n/);
+                var frames_1 = error.originalStack.split(/\n/);
                 var runFrame = false, runGuardedFrame = false, runTaskFrame = false;
-                while (frames_2.length) {
-                    var frame = frames_2.shift();
+                while (frames_1.length) {
+                    var frame = frames_1.shift();
                     // On safari it is possible to have stack frame with no line number.
                     // This check makes sure that we don't filter frames on name only (must have
-                    // line number)
-                    if (/:\d+:\d+/.test(frame)) {
+                    // line number or exact equals to `ZoneAwareError`)
+                    if (/:\d+:\d+/.test(frame) || frame === 'ZoneAwareError') {
                         // Get rid of the path so that we don't accidentally find function name in path.
                         // In chrome the separator is `(` and `@` in FF and safari
                         // Chrome: at Zone.run (zone.js:100)
                         // Chrome: at Zone.run (http://localhost:9876/base/build/lib/zone.js:100:24)
                         // FireFox: Zone.prototype.run@http://localhost:9876/base/build/lib/zone.js:101:24
                         // Safari: run@http://localhost:9876/base/build/lib/zone.js:101:24
-                        var fnName = frame.split(BRACKETS)[0].split(AT)[0];
+                        var fnName = frame.split('(')[0].split('@')[0];
                         var frameType = 1;
-                        if (fnName.indexOf(ZONE_AWARE_ERROR) !== -1) {
-                            zoneAwareFrame1 = frame;
-                            zoneAwareFrame2 = frame.replace(ERROR_DOT, EMPTY);
+                        if (fnName.indexOf('ZoneAwareError') !== -1) {
+                            if (fnName.indexOf('new ZoneAwareError') !== -1) {
+                                zoneAwareFrame1 = frame;
+                                zoneAwareFrame2 = frame.replace('new ZoneAwareError', 'new Error.ZoneAwareError');
+                            }
+                            else {
+                                zoneAwareFrame1WithoutNew = frame;
+                                zoneAwareFrame2WithoutNew = frame.replace('Error.', '');
+                                if (frame.indexOf('Error.ZoneAwareError') === -1) {
+                                    zoneAwareFrame3WithoutNew =
+                                        frame.replace('ZoneAwareError', 'Error.ZoneAwareError');
+                                }
+                            }
                             blackListedStackFrames[zoneAwareFrame2] = 0 /* blackList */;
                         }
-                        if (fnName.indexOf(RUN_GUARDED) !== -1) {
+                        if (fnName.indexOf('runGuarded') !== -1) {
                             runGuardedFrame = true;
                         }
-                        else if (fnName.indexOf(RUN_TASK) !== -1) {
+                        else if (fnName.indexOf('runTask') !== -1) {
                             runTaskFrame = true;
                         }
-                        else if (fnName.indexOf(RUN) !== -1) {
+                        else if (fnName.indexOf('run') !== -1) {
                             runFrame = true;
                         }
                         else {
@@ -267,16 +321,22 @@ Zone.__load_patch('Error', function (global, Zone, api) {
             childDetectZone.scheduleEventTask(blacklistedStackFramesSymbol, function () {
                 childDetectZone.scheduleMacroTask(blacklistedStackFramesSymbol, function () {
                     childDetectZone.scheduleMicroTask(blacklistedStackFramesSymbol, function () {
-                        throw new ZoneAwareError(ZoneAwareError, NativeError);
-                    }, null, function (t) {
+                        throw new Error();
+                    }, undefined, function (t) {
+                        t._transitionTo = fakeTransitionTo;
+                        t.invoke();
+                    });
+                    childDetectZone.scheduleMicroTask(blacklistedStackFramesSymbol, function () {
+                        throw Error();
+                    }, undefined, function (t) {
                         t._transitionTo = fakeTransitionTo;
                         t.invoke();
                     });
-                }, null, function (t) {
+                }, undefined, function (t) {
                     t._transitionTo = fakeTransitionTo;
                     t.invoke();
                 }, function () { });
-            }, null, function (t) {
+            }, undefined, function (t) {
                 t._transitionTo = fakeTransitionTo;
                 t.invoke();
             }, function () { });
diff --git a/dist/zone-error.min.js b/dist/zone-error.min.js
index 4aff20179..3bd3f4219 100644
--- a/dist/zone-error.min.js
+++ b/dist/zone-error.min.js
@@ -1 +1 @@
-!function(r,t){"object"==typeof exports&&"undefined"!=typeof module?t():"function"==typeof define&&define.amd?define(t):t()}(this,function(){"use strict";Zone.__load_patch("Error",function(r,t,e){function n(){var r=this,t=o.apply(this,arguments),i=t.originalStack=t.stack;if(n[f]&&i){for(var s=i.split("\n"),k=e.currentZoneFrame(),l=0;s[l]!==a&&s[l]!==c&&l<s.length;)l++;for(;l<s.length&&k;l++){var p=s[l];if(p.trim())switch(u[p]){case 0:s.splice(l,1),l--;break;case 1:k=k.parent?k.parent:null,s.splice(l,1),l--;break;default:s[l]+=" ["+k.zone.name+"]"}}try{t.stack=t.zoneAwareStack=s.join("\n")}catch(d){}}return this instanceof o&&this.constructor!=o?(Object.keys(t).concat("stack","message").forEach(function(e){var n=t[e];if(void 0!==n)try{r[e]=n}catch(a){}}),this):t}var a,c,i=e.symbol("blacklistedStackFrames"),o=r[e.symbol("Error")]=r.Error,u={};r.Error=n;var f="stackRewrite";n.prototype=o.prototype,n[i]=u,n[f]=!1;var s=["stackTraceLimit","captureStackTrace","prepareStackTrace"],k=Object.keys(o);k&&k.forEach(function(r){0===s.filter(function(t){return t===r}).length&&Object.defineProperty(n,r,{get:function(){return o[r]},set:function(t){o[r]=t}})}),o.hasOwnProperty("stackTraceLimit")&&(o.stackTraceLimit=Math.max(o.stackTraceLimit,15),Object.defineProperty(n,"stackTraceLimit",{get:function(){return o.stackTraceLimit},set:function(r){return o.stackTraceLimit=r}})),o.hasOwnProperty("captureStackTrace")&&Object.defineProperty(n,"captureStackTrace",{value:function(r,t){o.captureStackTrace(r,t)}});var l="zoneCaptureStackTrace";Object.defineProperty(n,"prepareStackTrace",{get:function(){return o.prepareStackTrace},set:function(r){return r&&"function"==typeof r?o.prepareStackTrace=function(t,e){if(e)for(var n=0;n<e.length;n++){var a=e[n];if(a.getFunctionName()===l){e.splice(n,1);break}}return r.call(this,t,e)}:o.prepareStackTrace=r}});var p="ZoneAwareError",d="Error.",T="",h="runGuarded",v="runTask",m="run",y="(",S="@",b=t.current.fork({name:"detect",onHandleError:function(r,t,e,i){if(i.originalStack&&Error===n)for(var o=i.originalStack.split(/\n/),s=!1,k=!1,l=!1;o.length;){var b=o.shift();if(/:\d+:\d+/.test(b)){var E=b.split(y)[0].split(S)[0],g=1;if(E.indexOf(p)!==-1&&(a=b,c=b.replace(d,T),u[c]=0),E.indexOf(h)!==-1?k=!0:E.indexOf(v)!==-1?l=!0:E.indexOf(m)!==-1?s=!0:g=0,u[b]=g,s&&k&&l){n[f]=!0;break}}}return!1}}),E=b.fork({name:"child",onScheduleTask:function(r,t,e,n){return r.scheduleTask(e,n)},onInvokeTask:function(r,t,e,n,a,c){return r.invokeTask(e,n,a,c)},onCancelTask:function(r,t,e,n){return r.cancelTask(e,n)},onInvoke:function(r,t,e,n,a,c,i){return r.invoke(e,n,a,c,i)}}),g=Error.stackTraceLimit;Error.stackTraceLimit=100,E.run(function(){E.runGuarded(function(){var r=function(){};E.scheduleEventTask(i,function(){E.scheduleMacroTask(i,function(){E.scheduleMicroTask(i,function(){throw new n(n,o)},null,function(t){t._transitionTo=r,t.invoke()})},null,function(t){t._transitionTo=r,t.invoke()},function(){})},null,function(t){t._transitionTo=r,t.invoke()},function(){})})}),Error.stackTraceLimit=g})});
\ No newline at end of file
+!function(r,e){"object"==typeof exports&&"undefined"!=typeof module?e():"function"==typeof define&&define.amd?define(e):e()}(this,function(){"use strict";Zone.__load_patch("Error",function(r,e,t){function n(r){for(var e={zoneName:r.zone.name},t=e;r.parent;){r=r.parent;var n={zoneName:r.zone.name};e.parent=n,e=n}return t}function a(r,e,t){void 0===t&&(t=!0);for(var n=r.split("\n"),a=0;n[a]!==i&&n[a]!==c&&n[a]!==s&&n[a]!==u&&n[a]!==f&&a<n.length;)a++;for(;a<n.length&&e;a++){var o=n[a];if(o.trim())switch(p[o]){case 0:n.splice(a,1),a--;break;case 1:e=e.parent?e.parent:null,n.splice(a,1),a--;break;default:n[a]+=t?" ["+e.zone.name+"]":" ["+e.zoneName+"]"}}return n.join("\n")}function o(){var r=this,e=l.apply(this,arguments),i=e.originalStack=e.stack;if(o[d]&&i){var c=t.currentZoneFrame();if("lazy"===h)e[t.symbol("zoneFrameNames")]=n(c);else if("default"===h)try{e.stack=e.zoneAwareStack=a(i,c)}catch(s){}}return this instanceof l&&this.constructor!=l?(Object.keys(e).concat("stack","message").forEach(function(t){var n=e[t];if(void 0!==n)try{r[t]=n}catch(a){}}),this):e}var i,c,s,u,f,k=t.symbol("blacklistedStackFrames"),l=r[t.symbol("Error")]=r.Error,p={};r.Error=o;var d="stackRewrite",h=r.__Zone_Error_BlacklistedStackFrames_policy||"default";o.prototype=l.prototype,o[k]=p,o[d]=!1;var m=t.symbol("zoneAwareStack");"lazy"===h&&Object.defineProperty(o.prototype,"zoneAwareStack",{configurable:!0,enumerable:!0,get:function(){return this[m]||(this[m]=a(this.originalStack,this[t.symbol("zoneFrameNames")],!1)),this[m]},set:function(r){this.originalStack=r,this[m]=a(this.originalStack,this[t.symbol("zoneFrameNames")],!1)}});var v=["stackTraceLimit","captureStackTrace","prepareStackTrace"],T=Object.keys(l);T&&T.forEach(function(r){0===v.filter(function(e){return e===r}).length&&Object.defineProperty(o,r,{get:function(){return l[r]},set:function(e){l[r]=e}})}),l.hasOwnProperty("stackTraceLimit")&&(l.stackTraceLimit=Math.max(l.stackTraceLimit,15),Object.defineProperty(o,"stackTraceLimit",{get:function(){return l.stackTraceLimit},set:function(r){return l.stackTraceLimit=r}})),l.hasOwnProperty("captureStackTrace")&&Object.defineProperty(o,"captureStackTrace",{value:function(r,e){l.captureStackTrace(r,e)}});var y="zoneCaptureStackTrace";if(Object.defineProperty(o,"prepareStackTrace",{get:function(){return l.prepareStackTrace},set:function(r){return r&&"function"==typeof r?l.prepareStackTrace=function(e,t){if(t)for(var n=0;n<t.length;n++){var a=t[n];if(a.getFunctionName()===y){t.splice(n,1);break}}return r.call(this,e,t)}:l.prepareStackTrace=r}}),"disable"!==h){var E=e.current.fork({name:"detect",onHandleError:function(r,e,t,n){if(n.originalStack&&Error===o)for(var a=n.originalStack.split(/\n/),k=!1,l=!1,h=!1;a.length;){var m=a.shift();if(/:\d+:\d+/.test(m)||"ZoneAwareError"===m){var v=m.split("(")[0].split("@")[0],T=1;if(v.indexOf("ZoneAwareError")!==-1&&(v.indexOf("new ZoneAwareError")!==-1?(i=m,c=m.replace("new ZoneAwareError","new Error.ZoneAwareError")):(s=m,u=m.replace("Error.",""),m.indexOf("Error.ZoneAwareError")===-1&&(f=m.replace("ZoneAwareError","Error.ZoneAwareError"))),p[c]=0),v.indexOf("runGuarded")!==-1?l=!0:v.indexOf("runTask")!==-1?h=!0:v.indexOf("run")!==-1?k=!0:T=0,p[m]=T,k&&l&&h){o[d]=!0;break}}}return!1}}),b=E.fork({name:"child",onScheduleTask:function(r,e,t,n){return r.scheduleTask(t,n)},onInvokeTask:function(r,e,t,n,a,o){return r.invokeTask(t,n,a,o)},onCancelTask:function(r,e,t,n){return r.cancelTask(t,n)},onInvoke:function(r,e,t,n,a,o,i){return r.invoke(t,n,a,o,i)}}),S=Error.stackTraceLimit;Error.stackTraceLimit=100,b.run(function(){b.runGuarded(function(){var r=function(){};b.scheduleEventTask(k,function(){b.scheduleMacroTask(k,function(){b.scheduleMicroTask(k,function(){throw new Error},void 0,function(e){e._transitionTo=r,e.invoke()}),b.scheduleMicroTask(k,function(){throw Error()},void 0,function(e){e._transitionTo=r,e.invoke()})},void 0,function(e){e._transitionTo=r,e.invoke()},function(){})},void 0,function(e){e._transitionTo=r,e.invoke()},function(){})})}),Error.stackTraceLimit=S}})});
\ No newline at end of file
diff --git a/dist/zone-mix.js b/dist/zone-mix.js
index 23a6e068f..bf2006a0b 100644
--- a/dist/zone-mix.js
+++ b/dist/zone-mix.js
@@ -19,7 +19,6 @@
  * found in the LICENSE file at https://angular.io/license
  */
 var Zone$1 = (function (global) {
-    var FUNCTION = 'function';
     var performance = global['performance'];
     function mark(name) {
         performance && performance['mark'] && performance['mark'](name);
@@ -28,12 +27,26 @@ var Zone$1 = (function (global) {
         performance && performance['measure'] && performance['measure'](name, label);
     }
     mark('Zone');
+    var checkDuplicate = global[('__zone_symbol__forceDuplicateZoneCheck')] === true;
     if (global['Zone']) {
-        throw new Error('Zone already loaded.');
+        // if global['Zone'] already exists (maybe zone.js was already loaded or
+        // some other lib also registered a global object named Zone), we may need
+        // to throw an error, but sometimes user may not want this error.
+        // For example,
+        // we have two web pages, page1 includes zone.js, page2 doesn't.
+        // and the 1st time user load page1 and page2, everything work fine,
+        // but when user load page2 again, error occurs because global['Zone'] already exists.
+        // so we add a flag to let user choose whether to throw this error or not.
+        // By default, if existing Zone is from zone.js, we will not throw the error.
+        if (checkDuplicate || typeof global['Zone'].__symbol__ !== 'function') {
+            throw new Error('Zone already loaded.');
+        }
+        else {
+            return global['Zone'];
+        }
     }
     var Zone = /** @class */ (function () {
         function Zone(parent, zoneSpec) {
-            this._properties = null;
             this._parent = parent;
             this._name = zoneSpec ? zoneSpec.name || 'unnamed' : '<root>';
             this._properties = zoneSpec && zoneSpec.properties || {};
@@ -76,7 +89,9 @@ var Zone$1 = (function (global) {
         });
         Zone.__load_patch = function (name, fn) {
             if (patches.hasOwnProperty(name)) {
-                throw Error('Already loaded patch: ' + name);
+                if (checkDuplicate) {
+                    throw Error('Already loaded patch: ' + name);
+                }
             }
             else if (!global['__Zone_disable_' + name]) {
                 var perfName = 'Zone:' + name;
@@ -120,7 +135,7 @@ var Zone$1 = (function (global) {
             return this._zoneDelegate.fork(this, zoneSpec);
         };
         Zone.prototype.wrap = function (callback, source) {
-            if (typeof callback !== FUNCTION) {
+            if (typeof callback !== 'function') {
                 throw new Error('Expecting function got: ' + callback);
             }
             var _callback = this._zoneDelegate.intercept(this, callback, source);
@@ -130,9 +145,6 @@ var Zone$1 = (function (global) {
             };
         };
         Zone.prototype.run = function (callback, applyThis, applyArgs, source) {
-            if (applyThis === void 0) { applyThis = undefined; }
-            if (applyArgs === void 0) { applyArgs = null; }
-            if (source === void 0) { source = null; }
             _currentZoneFrame = { parent: _currentZoneFrame, zone: this };
             try {
                 return this._zoneDelegate.invoke(this, callback, applyThis, applyArgs, source);
@@ -143,8 +155,6 @@ var Zone$1 = (function (global) {
         };
         Zone.prototype.runGuarded = function (callback, applyThis, applyArgs, source) {
             if (applyThis === void 0) { applyThis = null; }
-            if (applyArgs === void 0) { applyArgs = null; }
-            if (source === void 0) { source = null; }
             _currentZoneFrame = { parent: _currentZoneFrame, zone: this };
             try {
                 try {
@@ -168,10 +178,7 @@ var Zone$1 = (function (global) {
             // https://github.com/angular/zone.js/issues/778, sometimes eventTask
             // will run in notScheduled(canceled) state, we should not try to
             // run such kind of task but just return
-            // we have to define an variable here, if not
-            // typescript compiler will complain below
-            var isNotScheduled = task.state === notScheduled;
-            if (isNotScheduled && task.type === eventTask) {
+            if (task.state === notScheduled && (task.type === eventTask || task.type === macroTask)) {
                 return;
             }
             var reEntryGuard = task.state != running;
@@ -182,7 +189,7 @@ var Zone$1 = (function (global) {
             _currentZoneFrame = { parent: _currentZoneFrame, zone: this };
             try {
                 if (task.type == macroTask && task.data && !task.data.isPeriodic) {
-                    task.cancelFn = null;
+                    task.cancelFn = undefined;
                 }
                 try {
                     return this._zoneDelegate.invokeTask(this, task, applyThis, applyArgs);
@@ -218,8 +225,7 @@ var Zone$1 = (function (global) {
                 var newZone = this;
                 while (newZone) {
                     if (newZone === task.zone) {
-                        throw Error("can not reschedule task to " + this
-                            .name + " which is descendants of the original zone " + task.zone.name);
+                        throw Error("can not reschedule task to " + this.name + " which is descendants of the original zone " + task.zone.name);
                     }
                     newZone = newZone.parent;
                 }
@@ -249,7 +255,7 @@ var Zone$1 = (function (global) {
             return task;
         };
         Zone.prototype.scheduleMicroTask = function (source, callback, data, customSchedule) {
-            return this.scheduleTask(new ZoneTask(microTask, source, callback, data, customSchedule, null));
+            return this.scheduleTask(new ZoneTask(microTask, source, callback, data, customSchedule, undefined));
         };
         Zone.prototype.scheduleMacroTask = function (source, callback, data, customSchedule, customCancel) {
             return this.scheduleTask(new ZoneTask(macroTask, source, callback, data, customSchedule, customCancel));
@@ -290,16 +296,14 @@ var Zone$1 = (function (global) {
     }());
     var DELEGATE_ZS = {
         name: '',
-        onHasTask: function (delegate, _, target, hasTaskState) {
-            return delegate.hasTask(target, hasTaskState);
-        },
+        onHasTask: function (delegate, _, target, hasTaskState) { return delegate.hasTask(target, hasTaskState); },
         onScheduleTask: function (delegate, _, target, task) {
             return delegate.scheduleTask(target, task);
         },
-        onInvokeTask: function (delegate, _, target, task, applyThis, applyArgs) { return delegate.invokeTask(target, task, applyThis, applyArgs); },
-        onCancelTask: function (delegate, _, target, task) {
-            return delegate.cancelTask(target, task);
-        }
+        onInvokeTask: function (delegate, _, target, task, applyThis, applyArgs) {
+            return delegate.invokeTask(target, task, applyThis, applyArgs);
+        },
+        onCancelTask: function (delegate, _, target, task) { return delegate.cancelTask(target, task); }
     };
     var ZoneDelegate = /** @class */ (function () {
         function ZoneDelegate(zone, parentDelegate, zoneSpec) {
@@ -327,8 +331,8 @@ var Zone$1 = (function (global) {
                 zoneSpec && (zoneSpec.onHandleError ? this.zone : parentDelegate.zone);
             this._scheduleTaskZS =
                 zoneSpec && (zoneSpec.onScheduleTask ? zoneSpec : parentDelegate._scheduleTaskZS);
-            this._scheduleTaskDlgt =
-                zoneSpec && (zoneSpec.onScheduleTask ? parentDelegate : parentDelegate._scheduleTaskDlgt);
+            this._scheduleTaskDlgt = zoneSpec &&
+                (zoneSpec.onScheduleTask ? parentDelegate : parentDelegate._scheduleTaskDlgt);
             this._scheduleTaskCurrZone =
                 zoneSpec && (zoneSpec.onScheduleTask ? this.zone : parentDelegate.zone);
             this._invokeTaskZS =
@@ -383,8 +387,7 @@ var Zone$1 = (function (global) {
                 callback;
         };
         ZoneDelegate.prototype.invoke = function (targetZone, callback, applyThis, applyArgs, source) {
-            return this._invokeZS ?
-                this._invokeZS.onInvoke(this._invokeDlgt, this._invokeCurrZone, targetZone, callback, applyThis, applyArgs, source) :
+            return this._invokeZS ? this._invokeZS.onInvoke(this._invokeDlgt, this._invokeCurrZone, targetZone, callback, applyThis, applyArgs, source) :
                 callback.apply(applyThis, applyArgs);
         };
         ZoneDelegate.prototype.handleError = function (targetZone, error) {
@@ -416,8 +419,7 @@ var Zone$1 = (function (global) {
             return returnTask;
         };
         ZoneDelegate.prototype.invokeTask = function (targetZone, task, applyThis, applyArgs) {
-            return this._invokeTaskZS ?
-                this._invokeTaskZS.onInvokeTask(this._invokeTaskDlgt, this._invokeTaskCurrZone, targetZone, task, applyThis, applyArgs) :
+            return this._invokeTaskZS ? this._invokeTaskZS.onInvokeTask(this._invokeTaskDlgt, this._invokeTaskCurrZone, targetZone, task, applyThis, applyArgs) :
                 task.callback.apply(applyThis, applyArgs);
         };
         ZoneDelegate.prototype.cancelTask = function (targetZone, task) {
@@ -437,7 +439,7 @@ var Zone$1 = (function (global) {
             // hasTask should not throw error so other ZoneDelegate
             // can still trigger hasTask callback
             try {
-                return this._hasTaskZS &&
+                this._hasTaskZS &&
                     this._hasTaskZS.onHasTask(this._hasTaskDlgt, this._hasTaskCurrZone, targetZone, isEmpty);
             }
             catch (err) {
@@ -527,14 +529,12 @@ var Zone$1 = (function (global) {
                 }
             }
             else {
-                throw new Error(this.type + " '" + this.source + "': can not transition to '" + toState + "', expecting state '" + fromState1 + "'" + (fromState2 ?
-                    ' or \'' + fromState2 + '\'' :
-                    '') + ", was '" + this._state + "'.");
+                throw new Error(this.type + " '" + this.source + "': can not transition to '" + toState + "', expecting state '" + fromState1 + "'" + (fromState2 ? ' or \'' + fromState2 + '\'' : '') + ", was '" + this._state + "'.");
             }
         };
         ZoneTask.prototype.toString = function () {
             if (this.data && typeof this.data.handleId !== 'undefined') {
-                return this.data.handleId;
+                return this.data.handleId.toString();
             }
             else {
                 return Object.prototype.toString.call(this);
@@ -575,7 +575,13 @@ var Zone$1 = (function (global) {
                 }
             }
             if (nativeMicroTaskQueuePromise) {
-                nativeMicroTaskQueuePromise[symbolThen](drainMicroTaskQueue);
+                var nativeThen = nativeMicroTaskQueuePromise[symbolThen];
+                if (!nativeThen) {
+                    // native Promise is not patchable, we need to use `then` directly
+                    // issue 1078
+                    nativeThen = nativeMicroTaskQueuePromise['then'];
+                }
+                nativeThen.call(nativeMicroTaskQueuePromise, drainMicroTaskQueue);
             }
             else {
                 global[symbolSetTimeout](drainMicroTaskQueue, 0);
@@ -622,12 +628,13 @@ var Zone$1 = (function (global) {
         patchEventTarget: function () { return []; },
         patchOnProperties: noop,
         patchMethod: function () { return noop; },
-        bindArguments: function () { return null; },
+        bindArguments: function () { return []; },
+        patchThen: function () { return noop; },
         setNativePromise: function (NativePromise) {
             // sometimes NativePromise.resolve static function
             // is not ready yet, (such as core-js/es6.promise)
             // so we need to check here.
-            if (NativePromise && typeof NativePromise.resolve === FUNCTION) {
+            if (NativePromise && typeof NativePromise.resolve === 'function') {
                 nativeMicroTaskQueuePromise = NativePromise.resolve(0);
             }
         },
@@ -643,6 +650,16 @@ var Zone$1 = (function (global) {
     return global['Zone'] = Zone;
 })(typeof window !== 'undefined' && window || typeof self !== 'undefined' && self || global);
 
+var __values = (undefined && undefined.__values) || function (o) {
+    var m = typeof Symbol === "function" && o[Symbol.iterator], i = 0;
+    if (m) return m.call(o);
+    return {
+        next: function () {
+            if (o && i >= o.length) o = void 0;
+            return { value: o && o[i++], done: !o };
+        }
+    };
+};
 Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
     var ObjectGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
     var ObjectDefineProperty = Object.defineProperty;
@@ -785,7 +802,7 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
                 var queue = promise[symbolValue];
                 promise[symbolValue] = value;
                 if (promise[symbolFinally] === symbolFinally) {
-                    // the promise is generated by Promise.prototype.finally          
+                    // the promise is generated by Promise.prototype.finally
                     if (state === RESOLVED) {
                         // the state is resolved, should ignore the value
                         // and use parent promise value
@@ -869,7 +886,9 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
                     chainPromise[symbolParentPromiseState] = promiseState;
                 }
                 // should not pass value to finally callback
-                var value = zone.run(delegate, undefined, isFinallyPromise && delegate !== forwardRejection && delegate !== forwardResolution ? [] : [parentPromiseValue]);
+                var value = zone.run(delegate, undefined, isFinallyPromise && delegate !== forwardRejection && delegate !== forwardResolution ?
+                    [] :
+                    [parentPromiseValue]);
                 resolvePromise(chainPromise, true, value);
             }
             catch (error) {
@@ -904,6 +923,7 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
             return resolvePromise(new this(null), REJECTED, error);
         };
         ZoneAwarePromise.race = function (values) {
+            var e_1, _a;
             var resolve;
             var reject;
             var promise = new this(function (res, rej) {
@@ -916,40 +936,70 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
             function onReject(error) {
                 promise && (promise = null || reject(error));
             }
-            for (var _i = 0, values_1 = values; _i < values_1.length; _i++) {
-                var value = values_1[_i];
-                if (!isThenable(value)) {
-                    value = this.resolve(value);
+            try {
+                for (var values_1 = __values(values), values_1_1 = values_1.next(); !values_1_1.done; values_1_1 = values_1.next()) {
+                    var value = values_1_1.value;
+                    if (!isThenable(value)) {
+                        value = this.resolve(value);
+                    }
+                    value.then(onResolve, onReject);
+                }
+            }
+            catch (e_1_1) { e_1 = { error: e_1_1 }; }
+            finally {
+                try {
+                    if (values_1_1 && !values_1_1.done && (_a = values_1.return)) _a.call(values_1);
                 }
-                value.then(onResolve, onReject);
+                finally { if (e_1) throw e_1.error; }
             }
             return promise;
         };
         ZoneAwarePromise.all = function (values) {
+            var e_2, _a;
             var resolve;
             var reject;
             var promise = new this(function (res, rej) {
                 resolve = res;
                 reject = rej;
             });
-            var count = 0;
+            // Start at 2 to prevent prematurely resolving if .then is called immediately.
+            var unresolvedCount = 2;
+            var valueIndex = 0;
             var resolvedValues = [];
-            for (var _i = 0, values_2 = values; _i < values_2.length; _i++) {
-                var value = values_2[_i];
+            var _loop_2 = function (value) {
                 if (!isThenable(value)) {
-                    value = this.resolve(value);
+                    value = this_1.resolve(value);
                 }
-                value.then((function (index) { return function (value) {
-                    resolvedValues[index] = value;
-                    count--;
-                    if (!count) {
+                var curValueIndex = valueIndex;
+                value.then(function (value) {
+                    resolvedValues[curValueIndex] = value;
+                    unresolvedCount--;
+                    if (unresolvedCount === 0) {
                         resolve(resolvedValues);
                     }
-                }; })(count), reject);
-                count++;
+                }, reject);
+                unresolvedCount++;
+                valueIndex++;
+            };
+            var this_1 = this;
+            try {
+                for (var values_2 = __values(values), values_2_1 = values_2.next(); !values_2_1.done; values_2_1 = values_2.next()) {
+                    var value = values_2_1.value;
+                    _loop_2(value);
+                }
             }
-            if (!count)
+            catch (e_2_1) { e_2 = { error: e_2_1 }; }
+            finally {
+                try {
+                    if (values_2_1 && !values_2_1.done && (_a = values_2.return)) _a.call(values_2);
+                }
+                finally { if (e_2) throw e_2.error; }
+            }
+            // Make the unresolvedCount zero-based again.
+            unresolvedCount -= 2;
+            if (unresolvedCount === 0) {
                 resolve(resolvedValues);
+            }
             return promise;
         };
         ZoneAwarePromise.prototype.then = function (onFulfilled, onRejected) {
@@ -1045,25 +1095,9 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
         };
         Ctor[symbolThenPatched] = true;
     }
-    function zoneify(fn) {
-        return function () {
-            var resultPromise = fn.apply(this, arguments);
-            if (resultPromise instanceof ZoneAwarePromise) {
-                return resultPromise;
-            }
-            var ctor = resultPromise.constructor;
-            if (!ctor[symbolThenPatched]) {
-                patchThen(ctor);
-            }
-            return resultPromise;
-        };
-    }
+    api.patchThen = patchThen;
     if (NativePromise) {
         patchThen(NativePromise);
-        var fetch_1 = global['fetch'];
-        if (typeof fetch_1 == 'function') {
-            global['fetch'] = zoneify(fetch_1);
-        }
     }
     // This is not part of public API, but it is useful for tests, so we expose it.
     Promise[Zone.__symbol__('uncaughtPromiseErrors')] = _uncaughtPromiseErrors;
@@ -1185,9 +1219,23 @@ var wrapFn = function (event) {
     }
     var target = this || event.target || _global;
     var listener = target[eventNameSymbol];
-    var result = listener && listener.apply(this, arguments);
-    if (result != undefined && !result) {
-        event.preventDefault();
+    var result;
+    if (isBrowser && target === internalWindow && event.type === 'error') {
+        // window.onerror have different signiture
+        // https://developer.mozilla.org/en-US/docs/Web/API/GlobalEventHandlers/onerror#window.onerror
+        // and onerror callback will prevent default when callback return true
+        var errorEvent = event;
+        result = listener &&
+            listener.call(this, errorEvent.message, errorEvent.filename, errorEvent.lineno, errorEvent.colno, errorEvent.error);
+        if (result === true) {
+            event.preventDefault();
+        }
+    }
+    else {
+        result = listener && listener.apply(this, arguments);
+        if (result != undefined && !result) {
+            event.preventDefault();
+        }
     }
     return result;
 };
@@ -1205,6 +1253,10 @@ function patchProperty(obj, prop, prototype) {
     if (!desc || !desc.configurable) {
         return;
     }
+    var onPropPatchedSymbol = zoneSymbol('on' + prop + 'patched');
+    if (obj.hasOwnProperty(onPropPatchedSymbol) && obj[onPropPatchedSymbol]) {
+        return;
+    }
     // A property descriptor cannot have getter/setter and be writable
     // deleting the writable and value properties avoids this error:
     //
@@ -1282,6 +1334,7 @@ function patchProperty(obj, prop, prototype) {
         return null;
     };
     ObjectDefineProperty(obj, prop, desc);
+    obj[onPropPatchedSymbol] = true;
 }
 function patchOnProperties(obj, properties, prototype) {
     if (properties) {
@@ -1372,6 +1425,33 @@ function patchClass(className) {
         }
     }
 }
+function copySymbolProperties(src, dest) {
+    if (typeof Object.getOwnPropertySymbols !== 'function') {
+        return;
+    }
+    var symbols = Object.getOwnPropertySymbols(src);
+    symbols.forEach(function (symbol) {
+        var desc = Object.getOwnPropertyDescriptor(src, symbol);
+        Object.defineProperty(dest, symbol, {
+            get: function () {
+                return src[symbol];
+            },
+            set: function (value) {
+                if (desc && (!desc.writable || typeof desc.set !== 'function')) {
+                    // if src[symbol] is not writable or not have a setter, just return
+                    return;
+                }
+                src[symbol] = value;
+            },
+            enumerable: desc ? desc.enumerable : true,
+            configurable: desc ? desc.configurable : true
+        });
+    });
+}
+var shouldCopySymbolProperties = false;
+function setShouldCopySymbolProperties(flag) {
+    shouldCopySymbolProperties = flag;
+}
 function patchMethod(target, name, patchFn) {
     var proto = target;
     while (proto && !proto.hasOwnProperty(name)) {
@@ -1382,7 +1462,7 @@ function patchMethod(target, name, patchFn) {
         proto = target;
     }
     var delegateName = zoneSymbol(name);
-    var delegate;
+    var delegate = null;
     if (proto && !(delegate = proto[delegateName])) {
         delegate = proto[delegateName] = proto[name];
         // check whether proto[name] is writable
@@ -1394,6 +1474,9 @@ function patchMethod(target, name, patchFn) {
                 return patchDelegate_1(this, arguments);
             };
             attachOriginToPatched(proto[name], delegate);
+            if (shouldCopySymbolProperties) {
+                copySymbolProperties(delegate, proto[name]);
+            }
         }
     }
     return delegate;
@@ -1412,7 +1495,7 @@ function patchMacroTask(obj, funcName, metaCreator) {
     setNative = patchMethod(obj, funcName, function (delegate) { return function (self, args) {
         var meta = metaCreator(self, args);
         if (meta.cbIdx >= 0 && typeof args[meta.cbIdx] === 'function') {
-            return scheduleMacroTaskWithCurrentZone(meta.name, args[meta.cbIdx], meta, scheduleTask, null);
+            return scheduleMacroTaskWithCurrentZone(meta.name, args[meta.cbIdx], meta, scheduleTask);
         }
         else {
             // cause an error by calling it directly.
@@ -1446,6 +1529,17 @@ function attachOriginToPatched(patched, original) {
 }
 var isDetectedIEOrEdge = false;
 var ieOrEdge = false;
+function isIE() {
+    try {
+        var ua = internalWindow.navigator.userAgent;
+        if (ua.indexOf('MSIE ') !== -1 || ua.indexOf('Trident/') !== -1) {
+            return true;
+        }
+    }
+    catch (error) {
+    }
+    return false;
+}
 function isIEOrEdge() {
     if (isDetectedIEOrEdge) {
         return ieOrEdge;
@@ -1527,6 +1621,21 @@ Zone.__load_patch('toString', function (global) {
  * @fileoverview
  * @suppress {missingRequire}
  */
+var passiveSupported = false;
+if (typeof window !== 'undefined') {
+    try {
+        var options = Object.defineProperty({}, 'passive', {
+            get: function () {
+                passiveSupported = true;
+            }
+        });
+        window.addEventListener('test', options, options);
+        window.removeEventListener('test', options, options);
+    }
+    catch (err) {
+        passiveSupported = false;
+    }
+}
 // an identifier to tell ZoneTask do not create a new invoke closure
 var OPTIMIZED_ZONE_EVENT_TASK_DATA = {
     useG: true
@@ -1662,6 +1771,7 @@ function patchEventTarget(_global, apis, patchOptions) {
         if (proto[zoneSymbolAddEventListener]) {
             return false;
         }
+        var eventNameToString = patchOptions && patchOptions.eventNameToString;
         // a shared global taskData to pass data for scheduleEventTask
         // so we do not need to create a new object just for pass some data
         var taskData = {};
@@ -1677,12 +1787,24 @@ function patchEventTarget(_global, apis, patchOptions) {
             nativePrependEventListener = proto[zoneSymbol(patchOptions.prepend)] =
                 proto[patchOptions.prepend];
         }
-        var customScheduleGlobal = function () {
+        function checkIsPassive(task) {
+            if (!passiveSupported && typeof taskData.options !== 'boolean' &&
+                typeof taskData.options !== 'undefined' && taskData.options !== null) {
+                // options is a non-null non-undefined object
+                // passive is not supported
+                // don't pass options as object
+                // just pass capture as a boolean
+                task.options = !!taskData.options.capture;
+                taskData.options = task.options;
+            }
+        }
+        var customScheduleGlobal = function (task) {
             // if there is already a task for the eventName + capture,
             // just return, because we use the shared globalZoneAwareCallback here.
             if (taskData.isExisting) {
                 return;
             }
+            checkIsPassive(task);
             return nativeAddEventListener.call(taskData.target, taskData.eventName, taskData.capture ? globalZoneAwareCaptureCallback : globalZoneAwareCallback, taskData.options);
         };
         var customCancelGlobal = function (task) {
@@ -1723,6 +1845,7 @@ function patchEventTarget(_global, apis, patchOptions) {
             return nativeRemoveEventListener.call(task.target, task.eventName, task.capture ? globalZoneAwareCaptureCallback : globalZoneAwareCallback, task.options);
         };
         var customScheduleNonGlobal = function (task) {
+            checkIsPassive(task);
             return nativeAddEventListener.call(taskData.target, taskData.eventName, task.invoke, taskData.options);
         };
         var customSchedulePrepend = function (task) {
@@ -1745,10 +1868,15 @@ function patchEventTarget(_global, apis, patchOptions) {
             if (prepend === void 0) { prepend = false; }
             return function () {
                 var target = this || _global;
+                var eventName = arguments[0];
                 var delegate = arguments[1];
                 if (!delegate) {
                     return nativeListener.apply(this, arguments);
                 }
+                if (isNode && eventName === 'uncaughtException') {
+                    // don't patch uncaughtException of nodejs to prevent endless loop
+                    return nativeListener.apply(this, arguments);
+                }
                 // don't create the bind delegate function for handleEvent
                 // case here to improve addEventListener performance
                 // we will create the bind delegate when invoke
@@ -1762,7 +1890,6 @@ function patchEventTarget(_global, apis, patchOptions) {
                 if (validateHandler && !validateHandler(nativeListener, delegate, target, arguments)) {
                     return;
                 }
-                var eventName = arguments[0];
                 var options = arguments[2];
                 if (blackListedEvents) {
                     // check black list
@@ -1792,8 +1919,8 @@ function patchEventTarget(_global, apis, patchOptions) {
                 var symbolEventName;
                 if (!symbolEventNames) {
                     // the code is duplicate, but I just want to get some better performance
-                    var falseEventName = eventName + FALSE_STR;
-                    var trueEventName = eventName + TRUE_STR;
+                    var falseEventName = (eventNameToString ? eventNameToString(eventName) : eventName) + FALSE_STR;
+                    var trueEventName = (eventNameToString ? eventNameToString(eventName) : eventName) + TRUE_STR;
                     var symbol = ZONE_SYMBOL_PREFIX + falseEventName;
                     var symbolCapture = ZONE_SYMBOL_PREFIX + trueEventName;
                     zoneSymbolEventNames$1[eventName] = {};
@@ -1828,7 +1955,8 @@ function patchEventTarget(_global, apis, patchOptions) {
                     source = targetSource[eventName];
                 }
                 if (!source) {
-                    source = constructorName + addSource + eventName;
+                    source = constructorName + addSource +
+                        (eventNameToString ? eventNameToString(eventName) : eventName);
                 }
                 // do not create a new object as task.data to pass those things
                 // just use the global shared one
@@ -1843,7 +1971,7 @@ function patchEventTarget(_global, apis, patchOptions) {
                 taskData.capture = capture;
                 taskData.eventName = eventName;
                 taskData.isExisting = isExisting;
-                var data = useGlobalCallback ? OPTIMIZED_ZONE_EVENT_TASK_DATA : null;
+                var data = useGlobalCallback ? OPTIMIZED_ZONE_EVENT_TASK_DATA : undefined;
                 // keep taskData into data to allow onScheduleEventTask to access the task information
                 if (data) {
                     data.taskData = taskData;
@@ -1861,7 +1989,11 @@ function patchEventTarget(_global, apis, patchOptions) {
                 if (once) {
                     options.once = true;
                 }
-                task.options = options;
+                if (!(!passiveSupported && typeof task.options === 'boolean')) {
+                    // if not support passive, and we pass an option object
+                    // to addEventListener, we should save the options to task
+                    task.options = options;
+                }
                 task.target = target;
                 task.capture = capture;
                 task.eventName = eventName;
@@ -1946,7 +2078,7 @@ function patchEventTarget(_global, apis, patchOptions) {
             var target = this || _global;
             var eventName = arguments[0];
             var listeners = [];
-            var tasks = findEventTasks(target, eventName);
+            var tasks = findEventTasks(target, eventNameToString ? eventNameToString(eventName) : eventName);
             for (var i = 0; i < tasks.length; i++) {
                 var task = tasks[i];
                 var delegate = task.originalDelegate ? task.originalDelegate : task.callback;
@@ -2102,9 +2234,9 @@ function patchTimer(window, setName, cancelName, nameSuffix) {
         patchMethod(window, setName, function (delegate) { return function (self, args) {
             if (typeof args[0] === 'function') {
                 var options = {
-                    handleId: null,
                     isPeriodic: nameSuffix === 'Interval',
-                    delay: (nameSuffix === 'Timeout' || nameSuffix === 'Interval') ? args[1] || 0 : null,
+                    delay: (nameSuffix === 'Timeout' || nameSuffix === 'Interval') ? args[1] || 0 :
+                        undefined,
                     args: args
                 };
                 var task = scheduleMacroTaskWithCurrentZone(setName, args[0], options, scheduleTask, clearTask);
@@ -2219,7 +2351,7 @@ function propertyPatch() {
     };
     Object.getOwnPropertyDescriptor = function (obj, prop) {
         var desc = _getOwnPropertyDescriptor(obj, prop);
-        if (isUnconfigurable(obj, prop)) {
+        if (desc && isUnconfigurable(obj, prop)) {
             desc.configurable = false;
         }
         return desc;
@@ -2447,10 +2579,10 @@ var globalEventHandlersEventNames = [
     'wheel'
 ];
 var documentEventNames = [
-    'afterscriptexecute', 'beforescriptexecute', 'DOMContentLoaded', 'fullscreenchange',
+    'afterscriptexecute', 'beforescriptexecute', 'DOMContentLoaded', 'freeze', 'fullscreenchange',
     'mozfullscreenchange', 'webkitfullscreenchange', 'msfullscreenchange', 'fullscreenerror',
     'mozfullscreenerror', 'webkitfullscreenerror', 'msfullscreenerror', 'readystatechange',
-    'visibilitychange'
+    'visibilitychange', 'resume'
 ];
 var windowEventNames = [
     'absolutedeviceorientation',
@@ -2562,7 +2694,7 @@ var websocketEventNames = ['close', 'error', 'open', 'message'];
 var workerEventNames = ['error', 'message'];
 var eventNames = globalEventHandlersEventNames.concat(webglEventNames, formEventNames, detailEventNames, documentEventNames, windowEventNames, htmlElementEventNames, ieElementEventNames);
 function filterProperties(target, onProperties, ignoreProperties) {
-    if (!ignoreProperties) {
+    if (!ignoreProperties || ignoreProperties.length === 0) {
         return onProperties;
     }
     var tip = ignoreProperties.filter(function (ip) { return ip.target === target; });
@@ -2587,13 +2719,14 @@ function propertyDescriptorPatch(api, _global) {
     }
     var supportsWebSocket = typeof WebSocket !== 'undefined';
     if (canPatchViaPropertyDescriptor()) {
-        var ignoreProperties = _global.__Zone_ignore_on_properties;
+        var ignoreProperties = _global['__Zone_ignore_on_properties'];
         // for browsers that we can patch the descriptor:  Chrome & Firefox
         if (isBrowser) {
             var internalWindow = window;
+            var ignoreErrorProperties = isIE ? [{ target: internalWindow, ignoreProperties: ['error'] }] : [];
             // in IE/Edge, onProp not exist in window object, but in WindowPrototype
             // so we need to pass WindowPrototype to check onProp exist or not
-            patchFilteredProperties(internalWindow, eventNames.concat(['messageerror']), ignoreProperties, ObjectGetPrototypeOf(internalWindow));
+            patchFilteredProperties(internalWindow, eventNames.concat(['messageerror']), ignoreProperties ? ignoreProperties.concat(ignoreErrorProperties) : ignoreProperties, ObjectGetPrototypeOf(internalWindow));
             patchFilteredProperties(Document.prototype, eventNames, ignoreProperties);
             if (typeof internalWindow['SVGElement'] !== 'undefined') {
                 patchFilteredProperties(internalWindow['SVGElement'].prototype, eventNames, ignoreProperties);
@@ -2615,9 +2748,9 @@ function propertyDescriptorPatch(api, _global) {
             }
         }
         patchFilteredProperties(XMLHttpRequest.prototype, XMLHttpRequestEventNames, ignoreProperties);
-        var XMLHttpRequestEventTarget = _global['XMLHttpRequestEventTarget'];
-        if (XMLHttpRequestEventTarget) {
-            patchFilteredProperties(XMLHttpRequestEventTarget && XMLHttpRequestEventTarget.prototype, XMLHttpRequestEventNames, ignoreProperties);
+        var XMLHttpRequestEventTarget_1 = _global['XMLHttpRequestEventTarget'];
+        if (XMLHttpRequestEventTarget_1) {
+            patchFilteredProperties(XMLHttpRequestEventTarget_1 && XMLHttpRequestEventTarget_1.prototype, XMLHttpRequestEventNames, ignoreProperties);
         }
         if (typeof IDBIndex !== 'undefined') {
             patchFilteredProperties(IDBIndex.prototype, IDBIndexEventNames, ignoreProperties);
@@ -2832,16 +2965,16 @@ function patchEvent(global, api) {
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.io/license
  */
-function registerElementPatch(_global) {
-    if ((!isBrowser && !isMix) || !('registerElement' in _global.document)) {
+function patchCallbacks(target, targetName, method, callbacks) {
+    var symbol = Zone.__symbol__(method);
+    if (target[symbol]) {
         return;
     }
-    var _registerElement = document.registerElement;
-    var callbacks = ['createdCallback', 'attachedCallback', 'detachedCallback', 'attributeChangedCallback'];
-    document.registerElement = function (name, opts) {
+    var nativeDelegate = target[symbol] = target[method];
+    target[method] = function (name, opts, options) {
         if (opts && opts.prototype) {
             callbacks.forEach(function (callback) {
-                var source = 'Document.registerElement::' + callback;
+                var source = targetName + "." + method + "::" + callback;
                 var prototype = opts.prototype;
                 if (prototype.hasOwnProperty(callback)) {
                     var descriptor = ObjectGetOwnPropertyDescriptor(prototype, callback);
@@ -2858,9 +2991,23 @@ function registerElementPatch(_global) {
                 }
             });
         }
-        return _registerElement.call(document, name, opts);
+        return nativeDelegate.call(target, name, opts, options);
     };
-    attachOriginToPatched(document.registerElement, _registerElement);
+    attachOriginToPatched(target[method], nativeDelegate);
+}
+function registerElementPatch(_global) {
+    if ((!isBrowser && !isMix) || !('registerElement' in _global.document)) {
+        return;
+    }
+    var callbacks = ['createdCallback', 'attachedCallback', 'detachedCallback', 'attributeChangedCallback'];
+    patchCallbacks(document, 'Document', 'registerElement', callbacks);
+}
+function patchCustomElements(_global) {
+    if ((!isBrowser && !isMix) || !('customElements' in _global)) {
+        return;
+    }
+    var callbacks = ['connectedCallback', 'disconnectedCallback', 'adoptedCallback', 'attributeChangedCallback'];
+    patchCallbacks(_global.customElements, 'customElements', 'define', callbacks);
 }
 
 /**
@@ -2923,7 +3070,10 @@ Zone.__load_patch('EventTarget', function (global, Zone, api) {
 Zone.__load_patch('on_property', function (global, Zone, api) {
     propertyDescriptorPatch(api, global);
     propertyPatch();
+});
+Zone.__load_patch('customElements', function (global, Zone, api) {
     registerElementPatch(global);
+    patchCustomElements(global);
 });
 Zone.__load_patch('canvas', function (global) {
     var HTMLCanvasElement = global['HTMLCanvasElement'];
@@ -2942,6 +3092,7 @@ Zone.__load_patch('XHR', function (global, Zone) {
     var XHR_LISTENER = zoneSymbol('xhrListener');
     var XHR_SCHEDULED = zoneSymbol('xhrScheduled');
     var XHR_URL = zoneSymbol('xhrURL');
+    var XHR_ERROR_BEFORE_SCHEDULED = zoneSymbol('xhrErrorBeforeScheduled');
     function patchXHR(window) {
         var XMLHttpRequestPrototype = XMLHttpRequest.prototype;
         function findPendingTask(target) {
@@ -2950,9 +3101,9 @@ Zone.__load_patch('XHR', function (global, Zone) {
         var oriAddListener = XMLHttpRequestPrototype[ZONE_SYMBOL_ADD_EVENT_LISTENER];
         var oriRemoveListener = XMLHttpRequestPrototype[ZONE_SYMBOL_REMOVE_EVENT_LISTENER];
         if (!oriAddListener) {
-            var XMLHttpRequestEventTarget = window['XMLHttpRequestEventTarget'];
-            if (XMLHttpRequestEventTarget) {
-                var XMLHttpRequestEventTargetPrototype = XMLHttpRequestEventTarget.prototype;
+            var XMLHttpRequestEventTarget_1 = window['XMLHttpRequestEventTarget'];
+            if (XMLHttpRequestEventTarget_1) {
+                var XMLHttpRequestEventTargetPrototype = XMLHttpRequestEventTarget_1.prototype;
                 oriAddListener = XMLHttpRequestEventTargetPrototype[ZONE_SYMBOL_ADD_EVENT_LISTENER];
                 oriRemoveListener = XMLHttpRequestEventTargetPrototype[ZONE_SYMBOL_REMOVE_EVENT_LISTENER];
             }
@@ -2960,9 +3111,10 @@ Zone.__load_patch('XHR', function (global, Zone) {
         var READY_STATE_CHANGE = 'readystatechange';
         var SCHEDULED = 'scheduled';
         function scheduleTask(task) {
-            XMLHttpRequest[XHR_SCHEDULED] = false;
             var data = task.data;
             var target = data.target;
+            target[XHR_SCHEDULED] = false;
+            target[XHR_ERROR_BEFORE_SCHEDULED] = false;
             // remove existing event listener
             var listener = target[XHR_LISTENER];
             if (!oriAddListener) {
@@ -2976,8 +3128,35 @@ Zone.__load_patch('XHR', function (global, Zone) {
                 if (target.readyState === target.DONE) {
                     // sometimes on some browsers XMLHttpRequest will fire onreadystatechange with
                     // readyState=4 multiple times, so we need to check task state here
-                    if (!data.aborted && XMLHttpRequest[XHR_SCHEDULED] && task.state === SCHEDULED) {
-                        task.invoke();
+                    if (!data.aborted && target[XHR_SCHEDULED] && task.state === SCHEDULED) {
+                        // check whether the xhr has registered onload listener
+                        // if that is the case, the task should invoke after all
+                        // onload listeners finish.
+                        var loadTasks = target['__zone_symbol__loadfalse'];
+                        if (loadTasks && loadTasks.length > 0) {
+                            var oriInvoke_1 = task.invoke;
+                            task.invoke = function () {
+                                // need to load the tasks again, because in other
+                                // load listener, they may remove themselves
+                                var loadTasks = target['__zone_symbol__loadfalse'];
+                                for (var i = 0; i < loadTasks.length; i++) {
+                                    if (loadTasks[i] === task) {
+                                        loadTasks.splice(i, 1);
+                                    }
+                                }
+                                if (!data.aborted && task.state === SCHEDULED) {
+                                    oriInvoke_1.call(task);
+                                }
+                            };
+                            loadTasks.push(task);
+                        }
+                        else {
+                            task.invoke();
+                        }
+                    }
+                    else if (!data.aborted && target[XHR_SCHEDULED] === false) {
+                        // error occurs when xhr.send()
+                        target[XHR_ERROR_BEFORE_SCHEDULED] = true;
                     }
                 }
             };
@@ -2987,7 +3166,7 @@ Zone.__load_patch('XHR', function (global, Zone) {
                 target[XHR_TASK] = task;
             }
             sendNative.apply(target, data.args);
-            XMLHttpRequest[XHR_SCHEDULED] = true;
+            target[XHR_SCHEDULED] = true;
             return task;
         }
         function placeholderCallback() { }
@@ -3004,24 +3183,32 @@ Zone.__load_patch('XHR', function (global, Zone) {
             return openNative.apply(self, args);
         }; });
         var XMLHTTPREQUEST_SOURCE = 'XMLHttpRequest.send';
+        var fetchTaskAborting = zoneSymbol('fetchTaskAborting');
+        var fetchTaskScheduling = zoneSymbol('fetchTaskScheduling');
         var sendNative = patchMethod(XMLHttpRequestPrototype, 'send', function () { return function (self, args) {
+            if (Zone.current[fetchTaskScheduling] === true) {
+                // a fetch is scheduling, so we are using xhr to polyfill fetch
+                // and because we already schedule macroTask for fetch, we should
+                // not schedule a macroTask for xhr again
+                return sendNative.apply(self, args);
+            }
             if (self[XHR_SYNC]) {
                 // if the XHR is sync there is no task to schedule, just execute the code.
                 return sendNative.apply(self, args);
             }
             else {
-                var options = {
-                    target: self,
-                    url: self[XHR_URL],
-                    isPeriodic: false,
-                    delay: null,
-                    args: args,
-                    aborted: false
-                };
-                return scheduleMacroTaskWithCurrentZone(XMLHTTPREQUEST_SOURCE, placeholderCallback, options, scheduleTask, clearTask);
+                var options = { target: self, url: self[XHR_URL], isPeriodic: false, args: args, aborted: false };
+                var task = scheduleMacroTaskWithCurrentZone(XMLHTTPREQUEST_SOURCE, placeholderCallback, options, scheduleTask, clearTask);
+                if (self && self[XHR_ERROR_BEFORE_SCHEDULED] === true && !options.aborted &&
+                    task.state === SCHEDULED) {
+                    // xhr request throw error when send
+                    // we should invoke task instead of leaving a scheduled
+                    // pending macroTask
+                    task.invoke();
+                }
             }
         }; });
-        var abortNative = patchMethod(XMLHttpRequestPrototype, 'abort', function () { return function (self) {
+        var abortNative = patchMethod(XMLHttpRequestPrototype, 'abort', function () { return function (self, args) {
             var task = findPendingTask(self);
             if (task && typeof task.type == 'string') {
                 // If the XHR has already completed, do nothing.
@@ -3033,6 +3220,10 @@ Zone.__load_patch('XHR', function (global, Zone) {
                 }
                 task.zone.cancelTask(task);
             }
+            else if (Zone.current[fetchTaskAborting] === true) {
+                // the abort is called from fetch polyfill, we need to call native abort of XHR.
+                return abortNative.apply(self, args);
+            }
             // Otherwise, we are trying to abort an XHR which has not yet been sent, so there is no
             // task
             // to cancel. Do nothing.
@@ -3069,6 +3260,20 @@ Zone.__load_patch('PromiseRejectionEvent', function (global, Zone) {
     }
 });
 
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+Zone.__load_patch('node_util', function (global, Zone, api) {
+    api.patchOnProperties = patchOnProperties;
+    api.patchMethod = patchMethod;
+    api.bindArguments = bindArguments;
+    setShouldCopySymbolProperties(true);
+});
+
 /**
  * @license
  * Copyright Google Inc. All Rights Reserved.
@@ -3088,6 +3293,15 @@ Zone.__load_patch('EventEmitter', function (global) {
         // same callback, same capture, same event name, just return
         return task.callback === delegate || task.callback.listener === delegate;
     };
+    var eventNameToString = function (eventName) {
+        if (typeof eventName === 'string') {
+            return eventName;
+        }
+        if (!eventName) {
+            return '';
+        }
+        return eventName.toString().replace('(', '_').replace(')', '_');
+    };
     function patchEventEmitterMethods(obj) {
         var result = patchEventTarget(global, [obj], {
             useG: false,
@@ -3098,7 +3312,8 @@ Zone.__load_patch('EventEmitter', function (global) {
             listeners: EE_LISTENERS,
             chkDup: false,
             rt: true,
-            diff: compareTaskCallbackVsDelegate
+            diff: compareTaskCallbackVsDelegate,
+            eventNameToString: eventNameToString
         });
         if (result && result[0]) {
             obj[EE_ON] = obj[EE_ADD_LISTENER];
@@ -3163,11 +3378,6 @@ Zone.__load_patch('fs', function () {
  */
 var set = 'set';
 var clear = 'clear';
-Zone.__load_patch('node_util', function (global, Zone, api) {
-    api.patchOnProperties = patchOnProperties;
-    api.patchMethod = patchMethod;
-    api.bindArguments = bindArguments;
-});
 Zone.__load_patch('node_timers', function (global, Zone) {
     // Timers
     var globalUseTimeoutFromTimer = false;
diff --git a/dist/zone-node.js b/dist/zone-node.js
index c857c893c..8bbe1e846 100644
--- a/dist/zone-node.js
+++ b/dist/zone-node.js
@@ -19,7 +19,6 @@
  * found in the LICENSE file at https://angular.io/license
  */
 var Zone$1 = (function (global) {
-    var FUNCTION = 'function';
     var performance = global['performance'];
     function mark(name) {
         performance && performance['mark'] && performance['mark'](name);
@@ -28,12 +27,26 @@ var Zone$1 = (function (global) {
         performance && performance['measure'] && performance['measure'](name, label);
     }
     mark('Zone');
+    var checkDuplicate = global[('__zone_symbol__forceDuplicateZoneCheck')] === true;
     if (global['Zone']) {
-        throw new Error('Zone already loaded.');
+        // if global['Zone'] already exists (maybe zone.js was already loaded or
+        // some other lib also registered a global object named Zone), we may need
+        // to throw an error, but sometimes user may not want this error.
+        // For example,
+        // we have two web pages, page1 includes zone.js, page2 doesn't.
+        // and the 1st time user load page1 and page2, everything work fine,
+        // but when user load page2 again, error occurs because global['Zone'] already exists.
+        // so we add a flag to let user choose whether to throw this error or not.
+        // By default, if existing Zone is from zone.js, we will not throw the error.
+        if (checkDuplicate || typeof global['Zone'].__symbol__ !== 'function') {
+            throw new Error('Zone already loaded.');
+        }
+        else {
+            return global['Zone'];
+        }
     }
     var Zone = /** @class */ (function () {
         function Zone(parent, zoneSpec) {
-            this._properties = null;
             this._parent = parent;
             this._name = zoneSpec ? zoneSpec.name || 'unnamed' : '<root>';
             this._properties = zoneSpec && zoneSpec.properties || {};
@@ -76,7 +89,9 @@ var Zone$1 = (function (global) {
         });
         Zone.__load_patch = function (name, fn) {
             if (patches.hasOwnProperty(name)) {
-                throw Error('Already loaded patch: ' + name);
+                if (checkDuplicate) {
+                    throw Error('Already loaded patch: ' + name);
+                }
             }
             else if (!global['__Zone_disable_' + name]) {
                 var perfName = 'Zone:' + name;
@@ -120,7 +135,7 @@ var Zone$1 = (function (global) {
             return this._zoneDelegate.fork(this, zoneSpec);
         };
         Zone.prototype.wrap = function (callback, source) {
-            if (typeof callback !== FUNCTION) {
+            if (typeof callback !== 'function') {
                 throw new Error('Expecting function got: ' + callback);
             }
             var _callback = this._zoneDelegate.intercept(this, callback, source);
@@ -130,9 +145,6 @@ var Zone$1 = (function (global) {
             };
         };
         Zone.prototype.run = function (callback, applyThis, applyArgs, source) {
-            if (applyThis === void 0) { applyThis = undefined; }
-            if (applyArgs === void 0) { applyArgs = null; }
-            if (source === void 0) { source = null; }
             _currentZoneFrame = { parent: _currentZoneFrame, zone: this };
             try {
                 return this._zoneDelegate.invoke(this, callback, applyThis, applyArgs, source);
@@ -143,8 +155,6 @@ var Zone$1 = (function (global) {
         };
         Zone.prototype.runGuarded = function (callback, applyThis, applyArgs, source) {
             if (applyThis === void 0) { applyThis = null; }
-            if (applyArgs === void 0) { applyArgs = null; }
-            if (source === void 0) { source = null; }
             _currentZoneFrame = { parent: _currentZoneFrame, zone: this };
             try {
                 try {
@@ -168,10 +178,7 @@ var Zone$1 = (function (global) {
             // https://github.com/angular/zone.js/issues/778, sometimes eventTask
             // will run in notScheduled(canceled) state, we should not try to
             // run such kind of task but just return
-            // we have to define an variable here, if not
-            // typescript compiler will complain below
-            var isNotScheduled = task.state === notScheduled;
-            if (isNotScheduled && task.type === eventTask) {
+            if (task.state === notScheduled && (task.type === eventTask || task.type === macroTask)) {
                 return;
             }
             var reEntryGuard = task.state != running;
@@ -182,7 +189,7 @@ var Zone$1 = (function (global) {
             _currentZoneFrame = { parent: _currentZoneFrame, zone: this };
             try {
                 if (task.type == macroTask && task.data && !task.data.isPeriodic) {
-                    task.cancelFn = null;
+                    task.cancelFn = undefined;
                 }
                 try {
                     return this._zoneDelegate.invokeTask(this, task, applyThis, applyArgs);
@@ -218,8 +225,7 @@ var Zone$1 = (function (global) {
                 var newZone = this;
                 while (newZone) {
                     if (newZone === task.zone) {
-                        throw Error("can not reschedule task to " + this
-                            .name + " which is descendants of the original zone " + task.zone.name);
+                        throw Error("can not reschedule task to " + this.name + " which is descendants of the original zone " + task.zone.name);
                     }
                     newZone = newZone.parent;
                 }
@@ -249,7 +255,7 @@ var Zone$1 = (function (global) {
             return task;
         };
         Zone.prototype.scheduleMicroTask = function (source, callback, data, customSchedule) {
-            return this.scheduleTask(new ZoneTask(microTask, source, callback, data, customSchedule, null));
+            return this.scheduleTask(new ZoneTask(microTask, source, callback, data, customSchedule, undefined));
         };
         Zone.prototype.scheduleMacroTask = function (source, callback, data, customSchedule, customCancel) {
             return this.scheduleTask(new ZoneTask(macroTask, source, callback, data, customSchedule, customCancel));
@@ -290,16 +296,14 @@ var Zone$1 = (function (global) {
     }());
     var DELEGATE_ZS = {
         name: '',
-        onHasTask: function (delegate, _, target, hasTaskState) {
-            return delegate.hasTask(target, hasTaskState);
-        },
+        onHasTask: function (delegate, _, target, hasTaskState) { return delegate.hasTask(target, hasTaskState); },
         onScheduleTask: function (delegate, _, target, task) {
             return delegate.scheduleTask(target, task);
         },
-        onInvokeTask: function (delegate, _, target, task, applyThis, applyArgs) { return delegate.invokeTask(target, task, applyThis, applyArgs); },
-        onCancelTask: function (delegate, _, target, task) {
-            return delegate.cancelTask(target, task);
-        }
+        onInvokeTask: function (delegate, _, target, task, applyThis, applyArgs) {
+            return delegate.invokeTask(target, task, applyThis, applyArgs);
+        },
+        onCancelTask: function (delegate, _, target, task) { return delegate.cancelTask(target, task); }
     };
     var ZoneDelegate = /** @class */ (function () {
         function ZoneDelegate(zone, parentDelegate, zoneSpec) {
@@ -327,8 +331,8 @@ var Zone$1 = (function (global) {
                 zoneSpec && (zoneSpec.onHandleError ? this.zone : parentDelegate.zone);
             this._scheduleTaskZS =
                 zoneSpec && (zoneSpec.onScheduleTask ? zoneSpec : parentDelegate._scheduleTaskZS);
-            this._scheduleTaskDlgt =
-                zoneSpec && (zoneSpec.onScheduleTask ? parentDelegate : parentDelegate._scheduleTaskDlgt);
+            this._scheduleTaskDlgt = zoneSpec &&
+                (zoneSpec.onScheduleTask ? parentDelegate : parentDelegate._scheduleTaskDlgt);
             this._scheduleTaskCurrZone =
                 zoneSpec && (zoneSpec.onScheduleTask ? this.zone : parentDelegate.zone);
             this._invokeTaskZS =
@@ -383,8 +387,7 @@ var Zone$1 = (function (global) {
                 callback;
         };
         ZoneDelegate.prototype.invoke = function (targetZone, callback, applyThis, applyArgs, source) {
-            return this._invokeZS ?
-                this._invokeZS.onInvoke(this._invokeDlgt, this._invokeCurrZone, targetZone, callback, applyThis, applyArgs, source) :
+            return this._invokeZS ? this._invokeZS.onInvoke(this._invokeDlgt, this._invokeCurrZone, targetZone, callback, applyThis, applyArgs, source) :
                 callback.apply(applyThis, applyArgs);
         };
         ZoneDelegate.prototype.handleError = function (targetZone, error) {
@@ -416,8 +419,7 @@ var Zone$1 = (function (global) {
             return returnTask;
         };
         ZoneDelegate.prototype.invokeTask = function (targetZone, task, applyThis, applyArgs) {
-            return this._invokeTaskZS ?
-                this._invokeTaskZS.onInvokeTask(this._invokeTaskDlgt, this._invokeTaskCurrZone, targetZone, task, applyThis, applyArgs) :
+            return this._invokeTaskZS ? this._invokeTaskZS.onInvokeTask(this._invokeTaskDlgt, this._invokeTaskCurrZone, targetZone, task, applyThis, applyArgs) :
                 task.callback.apply(applyThis, applyArgs);
         };
         ZoneDelegate.prototype.cancelTask = function (targetZone, task) {
@@ -437,7 +439,7 @@ var Zone$1 = (function (global) {
             // hasTask should not throw error so other ZoneDelegate
             // can still trigger hasTask callback
             try {
-                return this._hasTaskZS &&
+                this._hasTaskZS &&
                     this._hasTaskZS.onHasTask(this._hasTaskDlgt, this._hasTaskCurrZone, targetZone, isEmpty);
             }
             catch (err) {
@@ -527,14 +529,12 @@ var Zone$1 = (function (global) {
                 }
             }
             else {
-                throw new Error(this.type + " '" + this.source + "': can not transition to '" + toState + "', expecting state '" + fromState1 + "'" + (fromState2 ?
-                    ' or \'' + fromState2 + '\'' :
-                    '') + ", was '" + this._state + "'.");
+                throw new Error(this.type + " '" + this.source + "': can not transition to '" + toState + "', expecting state '" + fromState1 + "'" + (fromState2 ? ' or \'' + fromState2 + '\'' : '') + ", was '" + this._state + "'.");
             }
         };
         ZoneTask.prototype.toString = function () {
             if (this.data && typeof this.data.handleId !== 'undefined') {
-                return this.data.handleId;
+                return this.data.handleId.toString();
             }
             else {
                 return Object.prototype.toString.call(this);
@@ -575,7 +575,13 @@ var Zone$1 = (function (global) {
                 }
             }
             if (nativeMicroTaskQueuePromise) {
-                nativeMicroTaskQueuePromise[symbolThen](drainMicroTaskQueue);
+                var nativeThen = nativeMicroTaskQueuePromise[symbolThen];
+                if (!nativeThen) {
+                    // native Promise is not patchable, we need to use `then` directly
+                    // issue 1078
+                    nativeThen = nativeMicroTaskQueuePromise['then'];
+                }
+                nativeThen.call(nativeMicroTaskQueuePromise, drainMicroTaskQueue);
             }
             else {
                 global[symbolSetTimeout](drainMicroTaskQueue, 0);
@@ -622,12 +628,13 @@ var Zone$1 = (function (global) {
         patchEventTarget: function () { return []; },
         patchOnProperties: noop,
         patchMethod: function () { return noop; },
-        bindArguments: function () { return null; },
+        bindArguments: function () { return []; },
+        patchThen: function () { return noop; },
         setNativePromise: function (NativePromise) {
             // sometimes NativePromise.resolve static function
             // is not ready yet, (such as core-js/es6.promise)
             // so we need to check here.
-            if (NativePromise && typeof NativePromise.resolve === FUNCTION) {
+            if (NativePromise && typeof NativePromise.resolve === 'function') {
                 nativeMicroTaskQueuePromise = NativePromise.resolve(0);
             }
         },
@@ -643,6 +650,16 @@ var Zone$1 = (function (global) {
     return global['Zone'] = Zone;
 })(typeof window !== 'undefined' && window || typeof self !== 'undefined' && self || global);
 
+var __values = (undefined && undefined.__values) || function (o) {
+    var m = typeof Symbol === "function" && o[Symbol.iterator], i = 0;
+    if (m) return m.call(o);
+    return {
+        next: function () {
+            if (o && i >= o.length) o = void 0;
+            return { value: o && o[i++], done: !o };
+        }
+    };
+};
 Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
     var ObjectGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
     var ObjectDefineProperty = Object.defineProperty;
@@ -785,7 +802,7 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
                 var queue = promise[symbolValue];
                 promise[symbolValue] = value;
                 if (promise[symbolFinally] === symbolFinally) {
-                    // the promise is generated by Promise.prototype.finally          
+                    // the promise is generated by Promise.prototype.finally
                     if (state === RESOLVED) {
                         // the state is resolved, should ignore the value
                         // and use parent promise value
@@ -869,7 +886,9 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
                     chainPromise[symbolParentPromiseState] = promiseState;
                 }
                 // should not pass value to finally callback
-                var value = zone.run(delegate, undefined, isFinallyPromise && delegate !== forwardRejection && delegate !== forwardResolution ? [] : [parentPromiseValue]);
+                var value = zone.run(delegate, undefined, isFinallyPromise && delegate !== forwardRejection && delegate !== forwardResolution ?
+                    [] :
+                    [parentPromiseValue]);
                 resolvePromise(chainPromise, true, value);
             }
             catch (error) {
@@ -904,6 +923,7 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
             return resolvePromise(new this(null), REJECTED, error);
         };
         ZoneAwarePromise.race = function (values) {
+            var e_1, _a;
             var resolve;
             var reject;
             var promise = new this(function (res, rej) {
@@ -916,40 +936,70 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
             function onReject(error) {
                 promise && (promise = null || reject(error));
             }
-            for (var _i = 0, values_1 = values; _i < values_1.length; _i++) {
-                var value = values_1[_i];
-                if (!isThenable(value)) {
-                    value = this.resolve(value);
+            try {
+                for (var values_1 = __values(values), values_1_1 = values_1.next(); !values_1_1.done; values_1_1 = values_1.next()) {
+                    var value = values_1_1.value;
+                    if (!isThenable(value)) {
+                        value = this.resolve(value);
+                    }
+                    value.then(onResolve, onReject);
                 }
-                value.then(onResolve, onReject);
+            }
+            catch (e_1_1) { e_1 = { error: e_1_1 }; }
+            finally {
+                try {
+                    if (values_1_1 && !values_1_1.done && (_a = values_1.return)) _a.call(values_1);
+                }
+                finally { if (e_1) throw e_1.error; }
             }
             return promise;
         };
         ZoneAwarePromise.all = function (values) {
+            var e_2, _a;
             var resolve;
             var reject;
             var promise = new this(function (res, rej) {
                 resolve = res;
                 reject = rej;
             });
-            var count = 0;
+            // Start at 2 to prevent prematurely resolving if .then is called immediately.
+            var unresolvedCount = 2;
+            var valueIndex = 0;
             var resolvedValues = [];
-            for (var _i = 0, values_2 = values; _i < values_2.length; _i++) {
-                var value = values_2[_i];
+            var _loop_2 = function (value) {
                 if (!isThenable(value)) {
-                    value = this.resolve(value);
+                    value = this_1.resolve(value);
                 }
-                value.then((function (index) { return function (value) {
-                    resolvedValues[index] = value;
-                    count--;
-                    if (!count) {
+                var curValueIndex = valueIndex;
+                value.then(function (value) {
+                    resolvedValues[curValueIndex] = value;
+                    unresolvedCount--;
+                    if (unresolvedCount === 0) {
                         resolve(resolvedValues);
                     }
-                }; })(count), reject);
-                count++;
+                }, reject);
+                unresolvedCount++;
+                valueIndex++;
+            };
+            var this_1 = this;
+            try {
+                for (var values_2 = __values(values), values_2_1 = values_2.next(); !values_2_1.done; values_2_1 = values_2.next()) {
+                    var value = values_2_1.value;
+                    _loop_2(value);
+                }
             }
-            if (!count)
+            catch (e_2_1) { e_2 = { error: e_2_1 }; }
+            finally {
+                try {
+                    if (values_2_1 && !values_2_1.done && (_a = values_2.return)) _a.call(values_2);
+                }
+                finally { if (e_2) throw e_2.error; }
+            }
+            // Make the unresolvedCount zero-based again.
+            unresolvedCount -= 2;
+            if (unresolvedCount === 0) {
                 resolve(resolvedValues);
+            }
             return promise;
         };
         ZoneAwarePromise.prototype.then = function (onFulfilled, onRejected) {
@@ -1045,25 +1095,9 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
         };
         Ctor[symbolThenPatched] = true;
     }
-    function zoneify(fn) {
-        return function () {
-            var resultPromise = fn.apply(this, arguments);
-            if (resultPromise instanceof ZoneAwarePromise) {
-                return resultPromise;
-            }
-            var ctor = resultPromise.constructor;
-            if (!ctor[symbolThenPatched]) {
-                patchThen(ctor);
-            }
-            return resultPromise;
-        };
-    }
+    api.patchThen = patchThen;
     if (NativePromise) {
         patchThen(NativePromise);
-        var fetch_1 = global['fetch'];
-        if (typeof fetch_1 == 'function') {
-            global['fetch'] = zoneify(fetch_1);
-        }
     }
     // This is not part of public API, but it is useful for tests, so we expose it.
     Promise[Zone.__symbol__('uncaughtPromiseErrors')] = _uncaughtPromiseErrors;
@@ -1163,9 +1197,23 @@ var wrapFn = function (event) {
     }
     var target = this || event.target || _global;
     var listener = target[eventNameSymbol];
-    var result = listener && listener.apply(this, arguments);
-    if (result != undefined && !result) {
-        event.preventDefault();
+    var result;
+    if (isBrowser && target === internalWindow && event.type === 'error') {
+        // window.onerror have different signiture
+        // https://developer.mozilla.org/en-US/docs/Web/API/GlobalEventHandlers/onerror#window.onerror
+        // and onerror callback will prevent default when callback return true
+        var errorEvent = event;
+        result = listener &&
+            listener.call(this, errorEvent.message, errorEvent.filename, errorEvent.lineno, errorEvent.colno, errorEvent.error);
+        if (result === true) {
+            event.preventDefault();
+        }
+    }
+    else {
+        result = listener && listener.apply(this, arguments);
+        if (result != undefined && !result) {
+            event.preventDefault();
+        }
     }
     return result;
 };
@@ -1183,6 +1231,10 @@ function patchProperty(obj, prop, prototype) {
     if (!desc || !desc.configurable) {
         return;
     }
+    var onPropPatchedSymbol = zoneSymbol('on' + prop + 'patched');
+    if (obj.hasOwnProperty(onPropPatchedSymbol) && obj[onPropPatchedSymbol]) {
+        return;
+    }
     // A property descriptor cannot have getter/setter and be writable
     // deleting the writable and value properties avoids this error:
     //
@@ -1260,6 +1312,7 @@ function patchProperty(obj, prop, prototype) {
         return null;
     };
     ObjectDefineProperty(obj, prop, desc);
+    obj[onPropPatchedSymbol] = true;
 }
 function patchOnProperties(obj, properties, prototype) {
     if (properties) {
@@ -1282,6 +1335,33 @@ function patchOnProperties(obj, properties, prototype) {
 var originalInstanceKey = zoneSymbol('originalInstance');
 // wrap some native API on `window`
 
+function copySymbolProperties(src, dest) {
+    if (typeof Object.getOwnPropertySymbols !== 'function') {
+        return;
+    }
+    var symbols = Object.getOwnPropertySymbols(src);
+    symbols.forEach(function (symbol) {
+        var desc = Object.getOwnPropertyDescriptor(src, symbol);
+        Object.defineProperty(dest, symbol, {
+            get: function () {
+                return src[symbol];
+            },
+            set: function (value) {
+                if (desc && (!desc.writable || typeof desc.set !== 'function')) {
+                    // if src[symbol] is not writable or not have a setter, just return
+                    return;
+                }
+                src[symbol] = value;
+            },
+            enumerable: desc ? desc.enumerable : true,
+            configurable: desc ? desc.configurable : true
+        });
+    });
+}
+var shouldCopySymbolProperties = false;
+function setShouldCopySymbolProperties(flag) {
+    shouldCopySymbolProperties = flag;
+}
 function patchMethod(target, name, patchFn) {
     var proto = target;
     while (proto && !proto.hasOwnProperty(name)) {
@@ -1292,7 +1372,7 @@ function patchMethod(target, name, patchFn) {
         proto = target;
     }
     var delegateName = zoneSymbol(name);
-    var delegate;
+    var delegate = null;
     if (proto && !(delegate = proto[delegateName])) {
         delegate = proto[delegateName] = proto[name];
         // check whether proto[name] is writable
@@ -1304,6 +1384,9 @@ function patchMethod(target, name, patchFn) {
                 return patchDelegate_1(this, arguments);
             };
             attachOriginToPatched(proto[name], delegate);
+            if (shouldCopySymbolProperties) {
+                copySymbolProperties(delegate, proto[name]);
+            }
         }
     }
     return delegate;
@@ -1322,7 +1405,7 @@ function patchMacroTask(obj, funcName, metaCreator) {
     setNative = patchMethod(obj, funcName, function (delegate) { return function (self, args) {
         var meta = metaCreator(self, args);
         if (meta.cbIdx >= 0 && typeof args[meta.cbIdx] === 'function') {
-            return scheduleMacroTaskWithCurrentZone(meta.name, args[meta.cbIdx], meta, scheduleTask, null);
+            return scheduleMacroTaskWithCurrentZone(meta.name, args[meta.cbIdx], meta, scheduleTask);
         }
         else {
             // cause an error by calling it directly.
@@ -1409,6 +1492,20 @@ Zone.__load_patch('toString', function (global) {
     };
 });
 
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+Zone.__load_patch('node_util', function (global, Zone, api) {
+    api.patchOnProperties = patchOnProperties;
+    api.patchMethod = patchMethod;
+    api.bindArguments = bindArguments;
+    setShouldCopySymbolProperties(true);
+});
+
 /**
  * @license
  * Copyright Google Inc. All Rights Reserved.
@@ -1420,6 +1517,21 @@ Zone.__load_patch('toString', function (global) {
  * @fileoverview
  * @suppress {missingRequire}
  */
+var passiveSupported = false;
+if (typeof window !== 'undefined') {
+    try {
+        var options = Object.defineProperty({}, 'passive', {
+            get: function () {
+                passiveSupported = true;
+            }
+        });
+        window.addEventListener('test', options, options);
+        window.removeEventListener('test', options, options);
+    }
+    catch (err) {
+        passiveSupported = false;
+    }
+}
 // an identifier to tell ZoneTask do not create a new invoke closure
 var OPTIMIZED_ZONE_EVENT_TASK_DATA = {
     useG: true
@@ -1555,6 +1667,7 @@ function patchEventTarget(_global, apis, patchOptions) {
         if (proto[zoneSymbolAddEventListener]) {
             return false;
         }
+        var eventNameToString = patchOptions && patchOptions.eventNameToString;
         // a shared global taskData to pass data for scheduleEventTask
         // so we do not need to create a new object just for pass some data
         var taskData = {};
@@ -1570,12 +1683,24 @@ function patchEventTarget(_global, apis, patchOptions) {
             nativePrependEventListener = proto[zoneSymbol(patchOptions.prepend)] =
                 proto[patchOptions.prepend];
         }
-        var customScheduleGlobal = function () {
+        function checkIsPassive(task) {
+            if (!passiveSupported && typeof taskData.options !== 'boolean' &&
+                typeof taskData.options !== 'undefined' && taskData.options !== null) {
+                // options is a non-null non-undefined object
+                // passive is not supported
+                // don't pass options as object
+                // just pass capture as a boolean
+                task.options = !!taskData.options.capture;
+                taskData.options = task.options;
+            }
+        }
+        var customScheduleGlobal = function (task) {
             // if there is already a task for the eventName + capture,
             // just return, because we use the shared globalZoneAwareCallback here.
             if (taskData.isExisting) {
                 return;
             }
+            checkIsPassive(task);
             return nativeAddEventListener.call(taskData.target, taskData.eventName, taskData.capture ? globalZoneAwareCaptureCallback : globalZoneAwareCallback, taskData.options);
         };
         var customCancelGlobal = function (task) {
@@ -1616,6 +1741,7 @@ function patchEventTarget(_global, apis, patchOptions) {
             return nativeRemoveEventListener.call(task.target, task.eventName, task.capture ? globalZoneAwareCaptureCallback : globalZoneAwareCallback, task.options);
         };
         var customScheduleNonGlobal = function (task) {
+            checkIsPassive(task);
             return nativeAddEventListener.call(taskData.target, taskData.eventName, task.invoke, taskData.options);
         };
         var customSchedulePrepend = function (task) {
@@ -1638,10 +1764,15 @@ function patchEventTarget(_global, apis, patchOptions) {
             if (prepend === void 0) { prepend = false; }
             return function () {
                 var target = this || _global;
+                var eventName = arguments[0];
                 var delegate = arguments[1];
                 if (!delegate) {
                     return nativeListener.apply(this, arguments);
                 }
+                if (isNode && eventName === 'uncaughtException') {
+                    // don't patch uncaughtException of nodejs to prevent endless loop
+                    return nativeListener.apply(this, arguments);
+                }
                 // don't create the bind delegate function for handleEvent
                 // case here to improve addEventListener performance
                 // we will create the bind delegate when invoke
@@ -1655,7 +1786,6 @@ function patchEventTarget(_global, apis, patchOptions) {
                 if (validateHandler && !validateHandler(nativeListener, delegate, target, arguments)) {
                     return;
                 }
-                var eventName = arguments[0];
                 var options = arguments[2];
                 if (blackListedEvents) {
                     // check black list
@@ -1685,8 +1815,8 @@ function patchEventTarget(_global, apis, patchOptions) {
                 var symbolEventName;
                 if (!symbolEventNames) {
                     // the code is duplicate, but I just want to get some better performance
-                    var falseEventName = eventName + FALSE_STR;
-                    var trueEventName = eventName + TRUE_STR;
+                    var falseEventName = (eventNameToString ? eventNameToString(eventName) : eventName) + FALSE_STR;
+                    var trueEventName = (eventNameToString ? eventNameToString(eventName) : eventName) + TRUE_STR;
                     var symbol = ZONE_SYMBOL_PREFIX + falseEventName;
                     var symbolCapture = ZONE_SYMBOL_PREFIX + trueEventName;
                     zoneSymbolEventNames$1[eventName] = {};
@@ -1721,7 +1851,8 @@ function patchEventTarget(_global, apis, patchOptions) {
                     source = targetSource[eventName];
                 }
                 if (!source) {
-                    source = constructorName + addSource + eventName;
+                    source = constructorName + addSource +
+                        (eventNameToString ? eventNameToString(eventName) : eventName);
                 }
                 // do not create a new object as task.data to pass those things
                 // just use the global shared one
@@ -1736,7 +1867,7 @@ function patchEventTarget(_global, apis, patchOptions) {
                 taskData.capture = capture;
                 taskData.eventName = eventName;
                 taskData.isExisting = isExisting;
-                var data = useGlobalCallback ? OPTIMIZED_ZONE_EVENT_TASK_DATA : null;
+                var data = useGlobalCallback ? OPTIMIZED_ZONE_EVENT_TASK_DATA : undefined;
                 // keep taskData into data to allow onScheduleEventTask to access the task information
                 if (data) {
                     data.taskData = taskData;
@@ -1754,7 +1885,11 @@ function patchEventTarget(_global, apis, patchOptions) {
                 if (once) {
                     options.once = true;
                 }
-                task.options = options;
+                if (!(!passiveSupported && typeof task.options === 'boolean')) {
+                    // if not support passive, and we pass an option object
+                    // to addEventListener, we should save the options to task
+                    task.options = options;
+                }
                 task.target = target;
                 task.capture = capture;
                 task.eventName = eventName;
@@ -1839,7 +1974,7 @@ function patchEventTarget(_global, apis, patchOptions) {
             var target = this || _global;
             var eventName = arguments[0];
             var listeners = [];
-            var tasks = findEventTasks(target, eventName);
+            var tasks = findEventTasks(target, eventNameToString ? eventNameToString(eventName) : eventName);
             for (var i = 0; i < tasks.length; i++) {
                 var task = tasks[i];
                 var delegate = task.originalDelegate ? task.originalDelegate : task.callback;
@@ -1949,6 +2084,15 @@ Zone.__load_patch('EventEmitter', function (global) {
         // same callback, same capture, same event name, just return
         return task.callback === delegate || task.callback.listener === delegate;
     };
+    var eventNameToString = function (eventName) {
+        if (typeof eventName === 'string') {
+            return eventName;
+        }
+        if (!eventName) {
+            return '';
+        }
+        return eventName.toString().replace('(', '_').replace(')', '_');
+    };
     function patchEventEmitterMethods(obj) {
         var result = patchEventTarget(global, [obj], {
             useG: false,
@@ -1959,7 +2103,8 @@ Zone.__load_patch('EventEmitter', function (global) {
             listeners: EE_LISTENERS,
             chkDup: false,
             rt: true,
-            diff: compareTaskCallbackVsDelegate
+            diff: compareTaskCallbackVsDelegate,
+            eventNameToString: eventNameToString
         });
         if (result && result[0]) {
             obj[EE_ON] = obj[EE_ADD_LISTENER];
@@ -2068,9 +2213,9 @@ function patchTimer(window, setName, cancelName, nameSuffix) {
         patchMethod(window, setName, function (delegate) { return function (self, args) {
             if (typeof args[0] === 'function') {
                 var options = {
-                    handleId: null,
                     isPeriodic: nameSuffix === 'Interval',
-                    delay: (nameSuffix === 'Timeout' || nameSuffix === 'Interval') ? args[1] || 0 : null,
+                    delay: (nameSuffix === 'Timeout' || nameSuffix === 'Interval') ? args[1] || 0 :
+                        undefined,
                     args: args
                 };
                 var task = scheduleMacroTaskWithCurrentZone(setName, args[0], options, scheduleTask, clearTask);
@@ -2151,11 +2296,6 @@ function patchTimer(window, setName, cancelName, nameSuffix) {
  */
 var set = 'set';
 var clear = 'clear';
-Zone.__load_patch('node_util', function (global, Zone, api) {
-    api.patchOnProperties = patchOnProperties;
-    api.patchMethod = patchMethod;
-    api.bindArguments = bindArguments;
-});
 Zone.__load_patch('node_timers', function (global, Zone) {
     // Timers
     var globalUseTimeoutFromTimer = false;
diff --git a/dist/zone-patch-jsonp.js b/dist/zone-patch-jsonp.js
index 4dcf57382..d7e75f2b8 100644
--- a/dist/zone-patch-jsonp.js
+++ b/dist/zone-patch-jsonp.js
@@ -71,9 +71,10 @@ Zone.__load_patch('jsonp', function (global, Zone, api) {
             }
         });
         api.patchMethod(options.jsonp, options.sendFuncName, function (delegate) { return function (self, args) {
-            global[api.symbol('jsonpTask')] = Zone.current.scheduleMacroTask('jsonp', noop, {}, function (task) {
-                return delegate.apply(self, args);
-            }, noop);
+            global[api.symbol('jsonpTask')] =
+                Zone.current.scheduleMacroTask('jsonp', noop, {}, function (task) {
+                    return delegate.apply(self, args);
+                }, noop);
         }; });
     };
 });
diff --git a/dist/zone-patch-resize-observer.js b/dist/zone-patch-resize-observer.js
index e80c32588..b85d7ee9f 100644
--- a/dist/zone-patch-resize-observer.js
+++ b/dist/zone-patch-resize-observer.js
@@ -39,6 +39,7 @@ Zone.__load_patch('ResizeObserver', function (global, Zone, api) {
         if (callback) {
             args[0] = function (entries, observer) {
                 var _this = this;
+                var e_1, _a;
                 var zones = {};
                 var currZone = Zone.current;
                 try {
@@ -71,7 +72,6 @@ Zone.__load_patch('ResizeObserver', function (global, Zone, api) {
                         callback.call(_this, zoneEntriesInfo.entries, observer);
                     }
                 });
-                var e_1, _a;
             };
         }
         return args.length > 0 ? new ResizeObserver(args[0]) : new ResizeObserver();
@@ -109,7 +109,9 @@ Zone.__load_patch('ResizeObserver', function (global, Zone, api) {
     api.patchMethod(ResizeObserver.prototype, 'disconnect', function (delegate) { return function (self, args) {
         var targets = self[resizeObserverSymbol];
         if (targets) {
-            targets.forEach(function (target) { target[resizeObserverSymbol] = undefined; });
+            targets.forEach(function (target) {
+                target[resizeObserverSymbol] = undefined;
+            });
             self[resizeObserverSymbol] = undefined;
         }
         return delegate.apply(self, args);
diff --git a/dist/zone-patch-resize-observer.min.js b/dist/zone-patch-resize-observer.min.js
index 4e3ef0583..4762c8bc7 100644
--- a/dist/zone-patch-resize-observer.min.js
+++ b/dist/zone-patch-resize-observer.min.js
@@ -1 +1 @@
-!function(e,n){"object"==typeof exports&&"undefined"!=typeof module?n():"function"==typeof define&&define.amd?define(n):n()}(this,function(){"use strict";var e=function(e){var n="function"==typeof Symbol&&e[Symbol.iterator],r=0;return n?n.call(e):{next:function(){return e&&r>=e.length&&(e=void 0),{value:e&&e[r++],done:!e}}}};Zone.__load_patch("ResizeObserver",function(n,r,t){var o=n.ResizeObserver;if(o){var i=t.symbol("ResizeObserver");t.patchMethod(n,"ResizeObserver",function(n){return function(n,t){var u=t.length>0?t[0]:null;return u&&(t[0]=function(n,t){var o=this,a={},c=r.current;try{for(var f=e(n),l=f.next();!l.done;l=f.next()){var v=l.value,p=v.target[i];p||(p=c);var s=a[p.name];s||(a[p.name]=s={entries:[],zone:p}),s.entries.push(v)}}catch(h){d={error:h}}finally{try{l&&!l.done&&(y=f["return"])&&y.call(f)}finally{if(d)throw d.error}}Object.keys(a).forEach(function(e){var n=a[e];n.zone!==r.current?n.zone.run(u,o,[n.entries,t],"ResizeObserver"):u.call(o,n.entries,t)});var d,y}),t.length>0?new o(t[0]):new o}}),t.patchMethod(o.prototype,"observe",function(e){return function(n,t){var o=t.length>0?t[0]:null;if(!o)return e.apply(n,t);var u=n[i];return u||(u=n[i]=[]),u.push(o),o[i]=r.current,e.apply(n,t)}}),t.patchMethod(o.prototype,"unobserve",function(e){return function(n,r){var t=r.length>0?r[0]:null;if(!t)return e.apply(n,r);var o=n[i];if(o)for(var u=0;u<o.length;u++)if(o[u]===t){o.splice(u,1);break}return t[i]=void 0,e.apply(n,r)}}),t.patchMethod(o.prototype,"disconnect",function(e){return function(n,r){var t=n[i];return t&&(t.forEach(function(e){e[i]=void 0}),n[i]=void 0),e.apply(n,r)}})}})});
\ No newline at end of file
+!function(e,n){"object"==typeof exports&&"undefined"!=typeof module?n():"function"==typeof define&&define.amd?define(n):n()}(this,function(){"use strict";var e=function(e){var n="function"==typeof Symbol&&e[Symbol.iterator],r=0;return n?n.call(e):{next:function(){return e&&r>=e.length&&(e=void 0),{value:e&&e[r++],done:!e}}}};Zone.__load_patch("ResizeObserver",function(n,r,t){var o=n.ResizeObserver;if(o){var i=t.symbol("ResizeObserver");t.patchMethod(n,"ResizeObserver",function(n){return function(n,t){var u=t.length>0?t[0]:null;return u&&(t[0]=function(n,t){var o,a,c=this,f={},l=r.current;try{for(var p=e(n),v=p.next();!v.done;v=p.next()){var s=v.value,h=s.target[i];h||(h=l);var d=f[h.name];d||(f[h.name]=d={entries:[],zone:h}),d.entries.push(s)}}catch(y){o={error:y}}finally{try{v&&!v.done&&(a=p["return"])&&a.call(p)}finally{if(o)throw o.error}}Object.keys(f).forEach(function(e){var n=f[e];n.zone!==r.current?n.zone.run(u,c,[n.entries,t],"ResizeObserver"):u.call(c,n.entries,t)})}),t.length>0?new o(t[0]):new o}}),t.patchMethod(o.prototype,"observe",function(e){return function(n,t){var o=t.length>0?t[0]:null;if(!o)return e.apply(n,t);var u=n[i];return u||(u=n[i]=[]),u.push(o),o[i]=r.current,e.apply(n,t)}}),t.patchMethod(o.prototype,"unobserve",function(e){return function(n,r){var t=r.length>0?r[0]:null;if(!t)return e.apply(n,r);var o=n[i];if(o)for(var u=0;u<o.length;u++)if(o[u]===t){o.splice(u,1);break}return t[i]=void 0,e.apply(n,r)}}),t.patchMethod(o.prototype,"disconnect",function(e){return function(n,r){var t=n[i];return t&&(t.forEach(function(e){e[i]=void 0}),n[i]=void 0),e.apply(n,r)}})}})});
\ No newline at end of file
diff --git a/dist/zone-patch-rxjs-fake-async.js b/dist/zone-patch-rxjs-fake-async.js
index 861af0a37..a9702d479 100644
--- a/dist/zone-patch-rxjs-fake-async.js
+++ b/dist/zone-patch-rxjs-fake-async.js
@@ -6,10 +6,10 @@
 * found in the LICENSE file at https://angular.io/license
 */
 (function (global, factory) {
-	typeof exports === 'object' && typeof module !== 'undefined' ? factory(require('rxjs/Scheduler'), require('rxjs/scheduler/async'), require('rxjs/scheduler/asap')) :
-	typeof define === 'function' && define.amd ? define(['rxjs/Scheduler', 'rxjs/scheduler/async', 'rxjs/scheduler/asap'], factory) :
-	(factory(global.Scheduler,global.async,global.Rx.Scheduler));
-}(this, (function (Scheduler,async,asap) { 'use strict';
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(require('rxjs')) :
+	typeof define === 'function' && define.amd ? define(['rxjs'], factory) :
+	(factory(global.rxjs));
+}(this, (function (rxjs) { 'use strict';
 
 /**
  * @license
@@ -19,13 +19,13 @@
  * found in the LICENSE file at https://angular.io/license
  */
 Zone.__load_patch('rxjs.Scheduler.now', function (global, Zone, api) {
-    api.patchMethod(Scheduler.Scheduler, 'now', function (delegate) { return function (self, args) {
+    api.patchMethod(rxjs.Scheduler, 'now', function (delegate) { return function (self, args) {
         return Date.now.apply(self, args);
     }; });
-    api.patchMethod(async.async, 'now', function (delegate) { return function (self, args) {
+    api.patchMethod(rxjs.asyncScheduler, 'now', function (delegate) { return function (self, args) {
         return Date.now.apply(self, args);
     }; });
-    api.patchMethod(asap.asap, 'now', function (delegate) { return function (self, args) {
+    api.patchMethod(rxjs.asapScheduler, 'now', function (delegate) { return function (self, args) {
         return Date.now.apply(self, args);
     }; });
 });
diff --git a/dist/zone-patch-rxjs-fake-async.min.js b/dist/zone-patch-rxjs-fake-async.min.js
index 73bb37a79..83f51a607 100644
--- a/dist/zone-patch-rxjs-fake-async.min.js
+++ b/dist/zone-patch-rxjs-fake-async.min.js
@@ -1 +1 @@
-!function(e,n){"object"==typeof exports&&"undefined"!=typeof module?n(require("rxjs/Scheduler"),require("rxjs/scheduler/async"),require("rxjs/scheduler/asap")):"function"==typeof define&&define.amd?define(["rxjs/Scheduler","rxjs/scheduler/async","rxjs/scheduler/asap"],n):n(e.Scheduler,e.async,e.Rx.Scheduler)}(this,function(e,n,r){"use strict";Zone.__load_patch("rxjs.Scheduler.now",function(t,u,c){c.patchMethod(e.Scheduler,"now",function(e){return function(e,n){return Date.now.apply(e,n)}}),c.patchMethod(n.async,"now",function(e){return function(e,n){return Date.now.apply(e,n)}}),c.patchMethod(r.asap,"now",function(e){return function(e,n){return Date.now.apply(e,n)}})})});
\ No newline at end of file
+!function(n,e){"object"==typeof exports&&"undefined"!=typeof module?e(require("rxjs")):"function"==typeof define&&define.amd?define(["rxjs"],e):e(n.rxjs)}(this,function(n){"use strict";Zone.__load_patch("rxjs.Scheduler.now",function(e,t,o){o.patchMethod(n.Scheduler,"now",function(n){return function(n,e){return Date.now.apply(n,e)}}),o.patchMethod(n.asyncScheduler,"now",function(n){return function(n,e){return Date.now.apply(n,e)}}),o.patchMethod(n.asapScheduler,"now",function(n){return function(n,e){return Date.now.apply(n,e)}})})});
\ No newline at end of file
diff --git a/dist/zone-patch-rxjs.js b/dist/zone-patch-rxjs.js
index 878805077..ca96a3a1a 100644
--- a/dist/zone-patch-rxjs.js
+++ b/dist/zone-patch-rxjs.js
@@ -6,10 +6,10 @@
 * found in the LICENSE file at https://angular.io/license
 */
 (function (global, factory) {
-	typeof exports === 'object' && typeof module !== 'undefined' ? factory(require('rxjs/add/observable/bindCallback'), require('rxjs/add/observable/bindNodeCallback'), require('rxjs/add/observable/defer'), require('rxjs/add/observable/forkJoin'), require('rxjs/add/observable/fromEventPattern'), require('rxjs/add/operator/multicast'), require('rxjs/Observable'), require('rxjs/scheduler/asap'), require('rxjs/Subscriber'), require('rxjs/Subscription'), require('rxjs/symbol/rxSubscriber')) :
-	typeof define === 'function' && define.amd ? define(['rxjs/add/observable/bindCallback', 'rxjs/add/observable/bindNodeCallback', 'rxjs/add/observable/defer', 'rxjs/add/observable/forkJoin', 'rxjs/add/observable/fromEventPattern', 'rxjs/add/operator/multicast', 'rxjs/Observable', 'rxjs/scheduler/asap', 'rxjs/Subscriber', 'rxjs/Subscription', 'rxjs/symbol/rxSubscriber'], factory) :
-	(factory(null,null,null,null,null,null,global.Rx,global.Rx.Scheduler,global.Rx,global.Rx,global.Rx.Symbol));
-}(this, (function (bindCallback,bindNodeCallback,defer,forkJoin,fromEventPattern,multicast,Observable,asap,Subscriber,Subscription,rxSubscriber) { 'use strict';
+	typeof exports === 'object' && typeof module !== 'undefined' ? factory(require('rxjs')) :
+	typeof define === 'function' && define.amd ? define(['rxjs'], factory) :
+	(factory(global.rxjs));
+}(this, (function (rxjs) { 'use strict';
 
 /**
  * @license
@@ -18,39 +18,17 @@
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.io/license
  */
-Zone.__load_patch('rxjs', function (global, Zone) {
+Zone.__load_patch('rxjs', function (global, Zone, api) {
     var symbol = Zone.__symbol__;
     var nextSource = 'rxjs.Subscriber.next';
     var errorSource = 'rxjs.Subscriber.error';
     var completeSource = 'rxjs.Subscriber.complete';
     var ObjectDefineProperties = Object.defineProperties;
-    var empty = {
-        closed: true,
-        next: function (value) { },
-        error: function (err) { throw err; },
-        complete: function () { }
-    };
-    function toSubscriber(nextOrObserver, error, complete) {
-        if (nextOrObserver) {
-            if (nextOrObserver instanceof Subscriber.Subscriber) {
-                return nextOrObserver;
-            }
-            if (nextOrObserver[rxSubscriber.rxSubscriber]) {
-                return nextOrObserver[rxSubscriber.rxSubscriber]();
-            }
-        }
-        if (!nextOrObserver && !error && !complete) {
-            return new Subscriber.Subscriber(empty);
-        }
-        return new Subscriber.Subscriber(nextOrObserver, error, complete);
-    }
     var patchObservable = function () {
-        var ObservablePrototype = Observable.Observable.prototype;
-        var symbolSubscribe = symbol('subscribe');
+        var ObservablePrototype = rxjs.Observable.prototype;
         var _symbolSubscribe = symbol('_subscribe');
         var _subscribe = ObservablePrototype[_symbolSubscribe] = ObservablePrototype._subscribe;
-        var subscribe = ObservablePrototype[symbolSubscribe] = ObservablePrototype.subscribe;
-        ObjectDefineProperties(Observable.Observable.prototype, {
+        ObjectDefineProperties(rxjs.Observable.prototype, {
             _zone: { value: null, writable: true, configurable: true },
             _zoneSource: { value: null, writable: true, configurable: true },
             _zoneSubscribe: { value: null, writable: true, configurable: true },
@@ -70,7 +48,7 @@ Zone.__load_patch('rxjs', function (global, Zone) {
                     if (this._zoneSubscribe) {
                         return this._zoneSubscribe;
                     }
-                    else if (this.constructor === Observable.Observable) {
+                    else if (this.constructor === rxjs.Observable) {
                         return _subscribe;
                     }
                     var proto = Object.getPrototypeOf(this);
@@ -78,30 +56,55 @@ Zone.__load_patch('rxjs', function (global, Zone) {
                 },
                 set: function (subscribe) {
                     this._zone = Zone.current;
-                    this._zoneSubscribe = subscribe;
+                    this._zoneSubscribe = function () {
+                        if (this._zone && this._zone !== Zone.current) {
+                            var tearDown_1 = this._zone.run(subscribe, this, arguments);
+                            if (tearDown_1 && typeof tearDown_1 === 'function') {
+                                var zone_1 = this._zone;
+                                return function () {
+                                    if (zone_1 !== Zone.current) {
+                                        return zone_1.run(tearDown_1, this, arguments);
+                                    }
+                                    return tearDown_1.apply(this, arguments);
+                                };
+                            }
+                            return tearDown_1;
+                        }
+                        return subscribe.apply(this, arguments);
+                    };
                 }
             },
-            subscribe: {
-                writable: true,
-                configurable: true,
-                value: function (observerOrNext, error, complete) {
-                    // Only grab a zone if we Zone exists and it is different from the current zone.
-                    var _zone = this._zone;
-                    if (_zone && _zone !== Zone.current) {
-                        // Current Zone is different from the intended zone.
-                        // Restore the zone before invoking the subscribe callback.
-                        return _zone.run(subscribe, this, [toSubscriber(observerOrNext, error, complete)]);
-                    }
-                    return subscribe.call(this, observerOrNext, error, complete);
+            subjectFactory: {
+                get: function () {
+                    return this._zoneSubjectFactory;
+                },
+                set: function (factory) {
+                    var zone = this._zone;
+                    this._zoneSubjectFactory = function () {
+                        if (zone && zone !== Zone.current) {
+                            return zone.run(factory, this, arguments);
+                        }
+                        return factory.apply(this, arguments);
+                    };
                 }
             }
         });
     };
+    api.patchMethod(rxjs.Observable.prototype, 'lift', function (delegate) { return function (self, args) {
+        var observable = delegate.apply(self, args);
+        if (observable.operator) {
+            observable.operator._zone = Zone.current;
+            api.patchMethod(observable.operator, 'call', function (operatorDelegate) { return function (operatorSelf, operatorArgs) {
+                if (operatorSelf._zone && operatorSelf._zone !== Zone.current) {
+                    return operatorSelf._zone.run(operatorDelegate, operatorSelf, operatorArgs);
+                }
+                return operatorDelegate.apply(operatorSelf, operatorArgs);
+            }; });
+        }
+        return observable;
+    }; });
     var patchSubscription = function () {
-        var unsubscribeSymbol = symbol('unsubscribe');
-        var unsubscribe = Subscription.Subscription.prototype[unsubscribeSymbol] =
-            Subscription.Subscription.prototype.unsubscribe;
-        ObjectDefineProperties(Subscription.Subscription.prototype, {
+        ObjectDefineProperties(rxjs.Subscription.prototype, {
             _zone: { value: null, writable: true, configurable: true },
             _zoneUnsubscribe: { value: null, writable: true, configurable: true },
             _unsubscribe: {
@@ -114,32 +117,21 @@ Zone.__load_patch('rxjs', function (global, Zone) {
                 },
                 set: function (unsubscribe) {
                     this._zone = Zone.current;
-                    this._zoneUnsubscribe = unsubscribe;
-                }
-            },
-            unsubscribe: {
-                writable: true,
-                configurable: true,
-                value: function () {
-                    // Only grab a zone if we Zone exists and it is different from the current zone.
-                    var _zone = this._zone;
-                    if (_zone && _zone !== Zone.current) {
-                        // Current Zone is different from the intended zone.
-                        // Restore the zone before invoking the subscribe callback.
-                        _zone.run(unsubscribe, this);
-                    }
-                    else {
-                        unsubscribe.apply(this);
-                    }
+                    this._zoneUnsubscribe = function () {
+                        if (this._zone && this._zone !== Zone.current) {
+                            return this._zone.run(unsubscribe, this, arguments);
+                        }
+                        return unsubscribe.apply(this, arguments);
+                    };
                 }
             }
         });
     };
     var patchSubscriber = function () {
-        var next = Subscriber.Subscriber.prototype.next;
-        var error = Subscriber.Subscriber.prototype.error;
-        var complete = Subscriber.Subscriber.prototype.complete;
-        Object.defineProperty(Subscriber.Subscriber.prototype, 'destination', {
+        var next = rxjs.Subscriber.prototype.next;
+        var error = rxjs.Subscriber.prototype.error;
+        var complete = rxjs.Subscriber.prototype.complete;
+        Object.defineProperty(rxjs.Subscriber.prototype, 'destination', {
             configurable: true,
             get: function () {
                 return this._zoneDestination;
@@ -151,7 +143,7 @@ Zone.__load_patch('rxjs', function (global, Zone) {
         });
         // patch Subscriber.next to make sure it run
         // into SubscriptionZone
-        Subscriber.Subscriber.prototype.next = function () {
+        rxjs.Subscriber.prototype.next = function () {
             var currentZone = Zone.current;
             var subscriptionZone = this._zone;
             // for performance concern, check Zone.current
@@ -163,7 +155,7 @@ Zone.__load_patch('rxjs', function (global, Zone) {
                 return next.apply(this, arguments);
             }
         };
-        Subscriber.Subscriber.prototype.error = function () {
+        rxjs.Subscriber.prototype.error = function () {
             var currentZone = Zone.current;
             var subscriptionZone = this._zone;
             // for performance concern, check Zone.current
@@ -175,7 +167,7 @@ Zone.__load_patch('rxjs', function (global, Zone) {
                 return error.apply(this, arguments);
             }
         };
-        Subscriber.Subscriber.prototype.complete = function () {
+        rxjs.Subscriber.prototype.complete = function () {
             var currentZone = Zone.current;
             var subscriptionZone = this._zone;
             // for performance concern, check Zone.current
@@ -188,156 +180,9 @@ Zone.__load_patch('rxjs', function (global, Zone) {
             }
         };
     };
-    var patchObservableInstance = function (observable) {
-        observable._zone = Zone.current;
-    };
-    var patchObservableFactoryCreator = function (obj, factoryName) {
-        var symbolFactory = symbol(factoryName);
-        if (obj[symbolFactory]) {
-            return;
-        }
-        var factoryCreator = obj[symbolFactory] = obj[factoryName];
-        if (!factoryCreator) {
-            return;
-        }
-        obj[factoryName] = function () {
-            var factory = factoryCreator.apply(this, arguments);
-            return function () {
-                var observable = factory.apply(this, arguments);
-                patchObservableInstance(observable);
-                return observable;
-            };
-        };
-    };
-    var patchObservableFactory = function (obj, factoryName) {
-        var symbolFactory = symbol(factoryName);
-        if (obj[symbolFactory]) {
-            return;
-        }
-        var factory = obj[symbolFactory] = obj[factoryName];
-        if (!factory) {
-            return;
-        }
-        obj[factoryName] = function () {
-            var observable = factory.apply(this, arguments);
-            patchObservableInstance(observable);
-            return observable;
-        };
-    };
-    var patchObservableFactoryArgs = function (obj, factoryName) {
-        var symbolFactory = symbol(factoryName);
-        if (obj[symbolFactory]) {
-            return;
-        }
-        var factory = obj[symbolFactory] = obj[factoryName];
-        if (!factory) {
-            return;
-        }
-        obj[factoryName] = function () {
-            var initZone = Zone.current;
-            var args = Array.prototype.slice.call(arguments);
-            var _loop_1 = function (i) {
-                var arg = args[i];
-                if (typeof arg === 'function') {
-                    args[i] = function () {
-                        var argArgs = Array.prototype.slice.call(arguments);
-                        var runningZone = Zone.current;
-                        if (initZone && runningZone && initZone !== runningZone) {
-                            return initZone.run(arg, this, argArgs);
-                        }
-                        else {
-                            return arg.apply(this, argArgs);
-                        }
-                    };
-                }
-            };
-            for (var i = 0; i < args.length; i++) {
-                _loop_1(i);
-            }
-            var observable = factory.apply(this, args);
-            patchObservableInstance(observable);
-            return observable;
-        };
-    };
-    var patchMulticast = function () {
-        var obj = Observable.Observable.prototype;
-        var factoryName = 'multicast';
-        var symbolFactory = symbol(factoryName);
-        if (obj[symbolFactory]) {
-            return;
-        }
-        var factory = obj[symbolFactory] = obj[factoryName];
-        if (!factory) {
-            return;
-        }
-        obj[factoryName] = function () {
-            var _zone = Zone.current;
-            var args = Array.prototype.slice.call(arguments);
-            var subjectOrSubjectFactory = args.length > 0 ? args[0] : undefined;
-            if (typeof subjectOrSubjectFactory !== 'function') {
-                var originalFactory_1 = subjectOrSubjectFactory;
-                subjectOrSubjectFactory = function () {
-                    return originalFactory_1;
-                };
-            }
-            args[0] = function () {
-                var subject;
-                if (_zone && _zone !== Zone.current) {
-                    subject = _zone.run(subjectOrSubjectFactory, this, arguments);
-                }
-                else {
-                    subject = subjectOrSubjectFactory.apply(this, arguments);
-                }
-                if (subject && _zone) {
-                    subject._zone = _zone;
-                }
-                return subject;
-            };
-            var observable = factory.apply(this, args);
-            patchObservableInstance(observable);
-            return observable;
-        };
-    };
-    var patchImmediate = function (asap$$1) {
-        if (!asap$$1) {
-            return;
-        }
-        var scheduleSymbol = symbol('scheduleSymbol');
-        var zoneSymbol = symbol('zone');
-        if (asap$$1[scheduleSymbol]) {
-            return;
-        }
-        var schedule = asap$$1[scheduleSymbol] = asap$$1.schedule;
-        asap$$1.schedule = function () {
-            var args = Array.prototype.slice.call(arguments);
-            var work = args.length > 0 ? args[0] : undefined;
-            var delay = args.length > 1 ? args[1] : 0;
-            var state = (args.length > 2 ? args[2] : undefined) || {};
-            state[zoneSymbol] = Zone.current;
-            var patchedWork = function () {
-                var workArgs = Array.prototype.slice.call(arguments);
-                var action = workArgs.length > 0 ? workArgs[0] : undefined;
-                var scheduleZone = action && action[zoneSymbol];
-                if (scheduleZone && scheduleZone !== Zone.current) {
-                    return scheduleZone.runGuarded(work, this, arguments);
-                }
-                else {
-                    return work.apply(this, arguments);
-                }
-            };
-            return schedule.call(this, patchedWork, delay, state);
-        };
-    };
     patchObservable();
     patchSubscription();
     patchSubscriber();
-    patchObservableFactoryCreator(Observable.Observable, 'bindCallback');
-    patchObservableFactoryCreator(Observable.Observable, 'bindNodeCallback');
-    patchObservableFactory(Observable.Observable, 'defer');
-    patchObservableFactory(Observable.Observable, 'forkJoin');
-    patchObservableFactoryArgs(Observable.Observable, 'fromEventPattern');
-    patchMulticast();
-    patchImmediate(asap.asap);
 });
 
 })));
diff --git a/dist/zone-patch-rxjs.min.js b/dist/zone-patch-rxjs.min.js
index 8a509ada3..ead0815d5 100644
--- a/dist/zone-patch-rxjs.min.js
+++ b/dist/zone-patch-rxjs.min.js
@@ -1 +1 @@
-!function(r,e){"object"==typeof exports&&"undefined"!=typeof module?e(require("rxjs/add/observable/bindCallback"),require("rxjs/add/observable/bindNodeCallback"),require("rxjs/add/observable/defer"),require("rxjs/add/observable/forkJoin"),require("rxjs/add/observable/fromEventPattern"),require("rxjs/add/operator/multicast"),require("rxjs/Observable"),require("rxjs/scheduler/asap"),require("rxjs/Subscriber"),require("rxjs/Subscription"),require("rxjs/symbol/rxSubscriber")):"function"==typeof define&&define.amd?define(["rxjs/add/observable/bindCallback","rxjs/add/observable/bindNodeCallback","rxjs/add/observable/defer","rxjs/add/observable/forkJoin","rxjs/add/observable/fromEventPattern","rxjs/add/operator/multicast","rxjs/Observable","rxjs/scheduler/asap","rxjs/Subscriber","rxjs/Subscription","rxjs/symbol/rxSubscriber"],e):e(null,null,null,null,null,null,r.Rx,r.Rx.Scheduler,r.Rx,r.Rx,r.Rx.Symbol)}(this,function(r,e,t,n,i,u,o,s,b,c,a){"use strict";Zone.__load_patch("rxjs",function(r,e){function t(r,e,t){if(r){if(r instanceof b.Subscriber)return r;if(r[a.rxSubscriber])return r[a.rxSubscriber]()}return r||e||t?new b.Subscriber(r,e,t):new b.Subscriber(p)}var n=e.__symbol__,i="rxjs.Subscriber.next",u="rxjs.Subscriber.error",l="rxjs.Subscriber.complete",f=Object.defineProperties,p={closed:!0,next:function(r){},error:function(r){throw r},complete:function(){}},v=function(){var r=o.Observable.prototype,i=n("subscribe"),u=n("_subscribe"),s=r[u]=r._subscribe,b=r[i]=r.subscribe;f(o.Observable.prototype,{_zone:{value:null,writable:!0,configurable:!0},_zoneSource:{value:null,writable:!0,configurable:!0},_zoneSubscribe:{value:null,writable:!0,configurable:!0},source:{configurable:!0,get:function(){return this._zoneSource},set:function(r){this._zone=e.current,this._zoneSource=r}},_subscribe:{configurable:!0,get:function(){if(this._zoneSubscribe)return this._zoneSubscribe;if(this.constructor===o.Observable)return s;var r=Object.getPrototypeOf(this);return r&&r._subscribe},set:function(r){this._zone=e.current,this._zoneSubscribe=r}},subscribe:{writable:!0,configurable:!0,value:function(r,n,i){var u=this._zone;return u&&u!==e.current?u.run(b,this,[t(r,n,i)]):b.call(this,r,n,i)}}})},d=function(){var r=n("unsubscribe"),t=c.Subscription.prototype[r]=c.Subscription.prototype.unsubscribe;f(c.Subscription.prototype,{_zone:{value:null,writable:!0,configurable:!0},_zoneUnsubscribe:{value:null,writable:!0,configurable:!0},_unsubscribe:{get:function(){if(this._zoneUnsubscribe)return this._zoneUnsubscribe;var r=Object.getPrototypeOf(this);return r&&r._unsubscribe},set:function(r){this._zone=e.current,this._zoneUnsubscribe=r}},unsubscribe:{writable:!0,configurable:!0,value:function(){var r=this._zone;r&&r!==e.current?r.run(t,this):t.apply(this)}}})},h=function(){var r=b.Subscriber.prototype.next,t=b.Subscriber.prototype.error,n=b.Subscriber.prototype.complete;Object.defineProperty(b.Subscriber.prototype,"destination",{configurable:!0,get:function(){return this._zoneDestination},set:function(r){this._zone=e.current,this._zoneDestination=r}}),b.Subscriber.prototype.next=function(){var t=e.current,n=this._zone;return n&&n!==t?n.run(r,this,arguments,i):r.apply(this,arguments)},b.Subscriber.prototype.error=function(){var r=e.current,n=this._zone;return n&&n!==r?n.run(t,this,arguments,u):t.apply(this,arguments)},b.Subscriber.prototype.complete=function(){var r=e.current,t=this._zone;return t&&t!==r?t.run(n,this,arguments,l):n.apply(this,arguments)}},y=function(r){r._zone=e.current},x=function(r,e){var t=n(e);if(!r[t]){var i=r[t]=r[e];i&&(r[e]=function(){var r=i.apply(this,arguments);return function(){var e=r.apply(this,arguments);return y(e),e}})}},_=function(r,e){var t=n(e);if(!r[t]){var i=r[t]=r[e];i&&(r[e]=function(){var r=i.apply(this,arguments);return y(r),r})}},S=function(r,t){var i=n(t);if(!r[i]){var u=r[i]=r[t];u&&(r[t]=function(){for(var r=e.current,t=Array.prototype.slice.call(arguments),n=function(n){var i=t[n];"function"==typeof i&&(t[n]=function(){var t=Array.prototype.slice.call(arguments),n=e.current;return r&&n&&r!==n?r.run(i,this,t):i.apply(this,t)})},i=0;i<t.length;i++)n(i);var o=u.apply(this,t);return y(o),o})}},j=function(){var r=o.Observable.prototype,t="multicast",i=n(t);if(!r[i]){var u=r[i]=r[t];u&&(r[t]=function(){var r=e.current,t=Array.prototype.slice.call(arguments),n=t.length>0?t[0]:void 0;if("function"!=typeof n){var i=n;n=function(){return i}}t[0]=function(){var t;return t=r&&r!==e.current?r.run(n,this,arguments):n.apply(this,arguments),t&&r&&(t._zone=r),t};var o=u.apply(this,t);return y(o),o})}},z=function(r){if(r){var t=n("scheduleSymbol"),i=n("zone");if(!r[t]){var u=r[t]=r.schedule;r.schedule=function(){var r=Array.prototype.slice.call(arguments),t=r.length>0?r[0]:void 0,n=r.length>1?r[1]:0,o=(r.length>2?r[2]:void 0)||{};o[i]=e.current;var s=function(){var r=Array.prototype.slice.call(arguments),n=r.length>0?r[0]:void 0,u=n&&n[i];return u&&u!==e.current?u.runGuarded(t,this,arguments):t.apply(this,arguments)};return u.call(this,s,n,o)}}}};v(),d(),h(),x(o.Observable,"bindCallback"),x(o.Observable,"bindNodeCallback"),_(o.Observable,"defer"),_(o.Observable,"forkJoin"),S(o.Observable,"fromEventPattern"),j(),z(s.asap)})});
\ No newline at end of file
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t(require("rxjs")):"function"==typeof define&&define.amd?define(["rxjs"],t):t(e.rxjs)}(this,function(e){"use strict";Zone.__load_patch("rxjs",function(t,r,n){var o=r.__symbol__,i="rxjs.Subscriber.next",u="rxjs.Subscriber.error",s="rxjs.Subscriber.complete",c=Object.defineProperties,b=function(){var t=e.Observable.prototype,n=o("_subscribe"),i=t[n]=t._subscribe;c(e.Observable.prototype,{_zone:{value:null,writable:!0,configurable:!0},_zoneSource:{value:null,writable:!0,configurable:!0},_zoneSubscribe:{value:null,writable:!0,configurable:!0},source:{configurable:!0,get:function(){return this._zoneSource},set:function(e){this._zone=r.current,this._zoneSource=e}},_subscribe:{configurable:!0,get:function(){if(this._zoneSubscribe)return this._zoneSubscribe;if(this.constructor===e.Observable)return i;var t=Object.getPrototypeOf(this);return t&&t._subscribe},set:function(e){this._zone=r.current,this._zoneSubscribe=function(){if(this._zone&&this._zone!==r.current){var t=this._zone.run(e,this,arguments);if(t&&"function"==typeof t){var n=this._zone;return function(){return n!==r.current?n.run(t,this,arguments):t.apply(this,arguments)}}return t}return e.apply(this,arguments)}}},subjectFactory:{get:function(){return this._zoneSubjectFactory},set:function(e){var t=this._zone;this._zoneSubjectFactory=function(){return t&&t!==r.current?t.run(e,this,arguments):e.apply(this,arguments)}}}})};n.patchMethod(e.Observable.prototype,"lift",function(e){return function(t,o){var i=e.apply(t,o);return i.operator&&(i.operator._zone=r.current,n.patchMethod(i.operator,"call",function(e){return function(t,n){return t._zone&&t._zone!==r.current?t._zone.run(e,t,n):e.apply(t,n)}})),i}});var a=function(){c(e.Subscription.prototype,{_zone:{value:null,writable:!0,configurable:!0},_zoneUnsubscribe:{value:null,writable:!0,configurable:!0},_unsubscribe:{get:function(){if(this._zoneUnsubscribe)return this._zoneUnsubscribe;var e=Object.getPrototypeOf(this);return e&&e._unsubscribe},set:function(e){this._zone=r.current,this._zoneUnsubscribe=function(){return this._zone&&this._zone!==r.current?this._zone.run(e,this,arguments):e.apply(this,arguments)}}}})},p=function(){var t=e.Subscriber.prototype.next,n=e.Subscriber.prototype.error,o=e.Subscriber.prototype.complete;Object.defineProperty(e.Subscriber.prototype,"destination",{configurable:!0,get:function(){return this._zoneDestination},set:function(e){this._zone=r.current,this._zoneDestination=e}}),e.Subscriber.prototype.next=function(){var e=r.current,n=this._zone;return n&&n!==e?n.run(t,this,arguments,i):t.apply(this,arguments)},e.Subscriber.prototype.error=function(){var e=r.current,t=this._zone;return t&&t!==e?t.run(n,this,arguments,u):n.apply(this,arguments)},e.Subscriber.prototype.complete=function(){var e=r.current,t=this._zone;return t&&t!==e?t.run(o,this,arguments,s):o.apply(this,arguments)}};b(),a(),p()})});
\ No newline at end of file
diff --git a/dist/zone-testing-bundle.js b/dist/zone-testing-bundle.js
index 7a8a81e5e..0f88dd882 100644
--- a/dist/zone-testing-bundle.js
+++ b/dist/zone-testing-bundle.js
@@ -19,7 +19,6 @@
  * found in the LICENSE file at https://angular.io/license
  */
 var Zone$1 = (function (global) {
-    var FUNCTION = 'function';
     var performance = global['performance'];
     function mark(name) {
         performance && performance['mark'] && performance['mark'](name);
@@ -28,12 +27,26 @@ var Zone$1 = (function (global) {
         performance && performance['measure'] && performance['measure'](name, label);
     }
     mark('Zone');
+    var checkDuplicate = global[('__zone_symbol__forceDuplicateZoneCheck')] === true;
     if (global['Zone']) {
-        throw new Error('Zone already loaded.');
+        // if global['Zone'] already exists (maybe zone.js was already loaded or
+        // some other lib also registered a global object named Zone), we may need
+        // to throw an error, but sometimes user may not want this error.
+        // For example,
+        // we have two web pages, page1 includes zone.js, page2 doesn't.
+        // and the 1st time user load page1 and page2, everything work fine,
+        // but when user load page2 again, error occurs because global['Zone'] already exists.
+        // so we add a flag to let user choose whether to throw this error or not.
+        // By default, if existing Zone is from zone.js, we will not throw the error.
+        if (checkDuplicate || typeof global['Zone'].__symbol__ !== 'function') {
+            throw new Error('Zone already loaded.');
+        }
+        else {
+            return global['Zone'];
+        }
     }
     var Zone = /** @class */ (function () {
         function Zone(parent, zoneSpec) {
-            this._properties = null;
             this._parent = parent;
             this._name = zoneSpec ? zoneSpec.name || 'unnamed' : '<root>';
             this._properties = zoneSpec && zoneSpec.properties || {};
@@ -76,7 +89,9 @@ var Zone$1 = (function (global) {
         });
         Zone.__load_patch = function (name, fn) {
             if (patches.hasOwnProperty(name)) {
-                throw Error('Already loaded patch: ' + name);
+                if (checkDuplicate) {
+                    throw Error('Already loaded patch: ' + name);
+                }
             }
             else if (!global['__Zone_disable_' + name]) {
                 var perfName = 'Zone:' + name;
@@ -120,7 +135,7 @@ var Zone$1 = (function (global) {
             return this._zoneDelegate.fork(this, zoneSpec);
         };
         Zone.prototype.wrap = function (callback, source) {
-            if (typeof callback !== FUNCTION) {
+            if (typeof callback !== 'function') {
                 throw new Error('Expecting function got: ' + callback);
             }
             var _callback = this._zoneDelegate.intercept(this, callback, source);
@@ -130,9 +145,6 @@ var Zone$1 = (function (global) {
             };
         };
         Zone.prototype.run = function (callback, applyThis, applyArgs, source) {
-            if (applyThis === void 0) { applyThis = undefined; }
-            if (applyArgs === void 0) { applyArgs = null; }
-            if (source === void 0) { source = null; }
             _currentZoneFrame = { parent: _currentZoneFrame, zone: this };
             try {
                 return this._zoneDelegate.invoke(this, callback, applyThis, applyArgs, source);
@@ -143,8 +155,6 @@ var Zone$1 = (function (global) {
         };
         Zone.prototype.runGuarded = function (callback, applyThis, applyArgs, source) {
             if (applyThis === void 0) { applyThis = null; }
-            if (applyArgs === void 0) { applyArgs = null; }
-            if (source === void 0) { source = null; }
             _currentZoneFrame = { parent: _currentZoneFrame, zone: this };
             try {
                 try {
@@ -168,10 +178,7 @@ var Zone$1 = (function (global) {
             // https://github.com/angular/zone.js/issues/778, sometimes eventTask
             // will run in notScheduled(canceled) state, we should not try to
             // run such kind of task but just return
-            // we have to define an variable here, if not
-            // typescript compiler will complain below
-            var isNotScheduled = task.state === notScheduled;
-            if (isNotScheduled && task.type === eventTask) {
+            if (task.state === notScheduled && (task.type === eventTask || task.type === macroTask)) {
                 return;
             }
             var reEntryGuard = task.state != running;
@@ -182,7 +189,7 @@ var Zone$1 = (function (global) {
             _currentZoneFrame = { parent: _currentZoneFrame, zone: this };
             try {
                 if (task.type == macroTask && task.data && !task.data.isPeriodic) {
-                    task.cancelFn = null;
+                    task.cancelFn = undefined;
                 }
                 try {
                     return this._zoneDelegate.invokeTask(this, task, applyThis, applyArgs);
@@ -218,8 +225,7 @@ var Zone$1 = (function (global) {
                 var newZone = this;
                 while (newZone) {
                     if (newZone === task.zone) {
-                        throw Error("can not reschedule task to " + this
-                            .name + " which is descendants of the original zone " + task.zone.name);
+                        throw Error("can not reschedule task to " + this.name + " which is descendants of the original zone " + task.zone.name);
                     }
                     newZone = newZone.parent;
                 }
@@ -249,7 +255,7 @@ var Zone$1 = (function (global) {
             return task;
         };
         Zone.prototype.scheduleMicroTask = function (source, callback, data, customSchedule) {
-            return this.scheduleTask(new ZoneTask(microTask, source, callback, data, customSchedule, null));
+            return this.scheduleTask(new ZoneTask(microTask, source, callback, data, customSchedule, undefined));
         };
         Zone.prototype.scheduleMacroTask = function (source, callback, data, customSchedule, customCancel) {
             return this.scheduleTask(new ZoneTask(macroTask, source, callback, data, customSchedule, customCancel));
@@ -290,16 +296,14 @@ var Zone$1 = (function (global) {
     }());
     var DELEGATE_ZS = {
         name: '',
-        onHasTask: function (delegate, _, target, hasTaskState) {
-            return delegate.hasTask(target, hasTaskState);
-        },
+        onHasTask: function (delegate, _, target, hasTaskState) { return delegate.hasTask(target, hasTaskState); },
         onScheduleTask: function (delegate, _, target, task) {
             return delegate.scheduleTask(target, task);
         },
-        onInvokeTask: function (delegate, _, target, task, applyThis, applyArgs) { return delegate.invokeTask(target, task, applyThis, applyArgs); },
-        onCancelTask: function (delegate, _, target, task) {
-            return delegate.cancelTask(target, task);
-        }
+        onInvokeTask: function (delegate, _, target, task, applyThis, applyArgs) {
+            return delegate.invokeTask(target, task, applyThis, applyArgs);
+        },
+        onCancelTask: function (delegate, _, target, task) { return delegate.cancelTask(target, task); }
     };
     var ZoneDelegate = /** @class */ (function () {
         function ZoneDelegate(zone, parentDelegate, zoneSpec) {
@@ -327,8 +331,8 @@ var Zone$1 = (function (global) {
                 zoneSpec && (zoneSpec.onHandleError ? this.zone : parentDelegate.zone);
             this._scheduleTaskZS =
                 zoneSpec && (zoneSpec.onScheduleTask ? zoneSpec : parentDelegate._scheduleTaskZS);
-            this._scheduleTaskDlgt =
-                zoneSpec && (zoneSpec.onScheduleTask ? parentDelegate : parentDelegate._scheduleTaskDlgt);
+            this._scheduleTaskDlgt = zoneSpec &&
+                (zoneSpec.onScheduleTask ? parentDelegate : parentDelegate._scheduleTaskDlgt);
             this._scheduleTaskCurrZone =
                 zoneSpec && (zoneSpec.onScheduleTask ? this.zone : parentDelegate.zone);
             this._invokeTaskZS =
@@ -383,8 +387,7 @@ var Zone$1 = (function (global) {
                 callback;
         };
         ZoneDelegate.prototype.invoke = function (targetZone, callback, applyThis, applyArgs, source) {
-            return this._invokeZS ?
-                this._invokeZS.onInvoke(this._invokeDlgt, this._invokeCurrZone, targetZone, callback, applyThis, applyArgs, source) :
+            return this._invokeZS ? this._invokeZS.onInvoke(this._invokeDlgt, this._invokeCurrZone, targetZone, callback, applyThis, applyArgs, source) :
                 callback.apply(applyThis, applyArgs);
         };
         ZoneDelegate.prototype.handleError = function (targetZone, error) {
@@ -416,8 +419,7 @@ var Zone$1 = (function (global) {
             return returnTask;
         };
         ZoneDelegate.prototype.invokeTask = function (targetZone, task, applyThis, applyArgs) {
-            return this._invokeTaskZS ?
-                this._invokeTaskZS.onInvokeTask(this._invokeTaskDlgt, this._invokeTaskCurrZone, targetZone, task, applyThis, applyArgs) :
+            return this._invokeTaskZS ? this._invokeTaskZS.onInvokeTask(this._invokeTaskDlgt, this._invokeTaskCurrZone, targetZone, task, applyThis, applyArgs) :
                 task.callback.apply(applyThis, applyArgs);
         };
         ZoneDelegate.prototype.cancelTask = function (targetZone, task) {
@@ -437,7 +439,7 @@ var Zone$1 = (function (global) {
             // hasTask should not throw error so other ZoneDelegate
             // can still trigger hasTask callback
             try {
-                return this._hasTaskZS &&
+                this._hasTaskZS &&
                     this._hasTaskZS.onHasTask(this._hasTaskDlgt, this._hasTaskCurrZone, targetZone, isEmpty);
             }
             catch (err) {
@@ -527,14 +529,12 @@ var Zone$1 = (function (global) {
                 }
             }
             else {
-                throw new Error(this.type + " '" + this.source + "': can not transition to '" + toState + "', expecting state '" + fromState1 + "'" + (fromState2 ?
-                    ' or \'' + fromState2 + '\'' :
-                    '') + ", was '" + this._state + "'.");
+                throw new Error(this.type + " '" + this.source + "': can not transition to '" + toState + "', expecting state '" + fromState1 + "'" + (fromState2 ? ' or \'' + fromState2 + '\'' : '') + ", was '" + this._state + "'.");
             }
         };
         ZoneTask.prototype.toString = function () {
             if (this.data && typeof this.data.handleId !== 'undefined') {
-                return this.data.handleId;
+                return this.data.handleId.toString();
             }
             else {
                 return Object.prototype.toString.call(this);
@@ -575,7 +575,13 @@ var Zone$1 = (function (global) {
                 }
             }
             if (nativeMicroTaskQueuePromise) {
-                nativeMicroTaskQueuePromise[symbolThen](drainMicroTaskQueue);
+                var nativeThen = nativeMicroTaskQueuePromise[symbolThen];
+                if (!nativeThen) {
+                    // native Promise is not patchable, we need to use `then` directly
+                    // issue 1078
+                    nativeThen = nativeMicroTaskQueuePromise['then'];
+                }
+                nativeThen.call(nativeMicroTaskQueuePromise, drainMicroTaskQueue);
             }
             else {
                 global[symbolSetTimeout](drainMicroTaskQueue, 0);
@@ -622,12 +628,13 @@ var Zone$1 = (function (global) {
         patchEventTarget: function () { return []; },
         patchOnProperties: noop,
         patchMethod: function () { return noop; },
-        bindArguments: function () { return null; },
+        bindArguments: function () { return []; },
+        patchThen: function () { return noop; },
         setNativePromise: function (NativePromise) {
             // sometimes NativePromise.resolve static function
             // is not ready yet, (such as core-js/es6.promise)
             // so we need to check here.
-            if (NativePromise && typeof NativePromise.resolve === FUNCTION) {
+            if (NativePromise && typeof NativePromise.resolve === 'function') {
                 nativeMicroTaskQueuePromise = NativePromise.resolve(0);
             }
         },
@@ -643,6 +650,16 @@ var Zone$1 = (function (global) {
     return global['Zone'] = Zone;
 })(typeof window !== 'undefined' && window || typeof self !== 'undefined' && self || global);
 
+var __values = (undefined && undefined.__values) || function (o) {
+    var m = typeof Symbol === "function" && o[Symbol.iterator], i = 0;
+    if (m) return m.call(o);
+    return {
+        next: function () {
+            if (o && i >= o.length) o = void 0;
+            return { value: o && o[i++], done: !o };
+        }
+    };
+};
 Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
     var ObjectGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
     var ObjectDefineProperty = Object.defineProperty;
@@ -785,7 +802,7 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
                 var queue = promise[symbolValue];
                 promise[symbolValue] = value;
                 if (promise[symbolFinally] === symbolFinally) {
-                    // the promise is generated by Promise.prototype.finally          
+                    // the promise is generated by Promise.prototype.finally
                     if (state === RESOLVED) {
                         // the state is resolved, should ignore the value
                         // and use parent promise value
@@ -869,7 +886,9 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
                     chainPromise[symbolParentPromiseState] = promiseState;
                 }
                 // should not pass value to finally callback
-                var value = zone.run(delegate, undefined, isFinallyPromise && delegate !== forwardRejection && delegate !== forwardResolution ? [] : [parentPromiseValue]);
+                var value = zone.run(delegate, undefined, isFinallyPromise && delegate !== forwardRejection && delegate !== forwardResolution ?
+                    [] :
+                    [parentPromiseValue]);
                 resolvePromise(chainPromise, true, value);
             }
             catch (error) {
@@ -904,6 +923,7 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
             return resolvePromise(new this(null), REJECTED, error);
         };
         ZoneAwarePromise.race = function (values) {
+            var e_1, _a;
             var resolve;
             var reject;
             var promise = new this(function (res, rej) {
@@ -916,40 +936,70 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
             function onReject(error) {
                 promise && (promise = null || reject(error));
             }
-            for (var _i = 0, values_1 = values; _i < values_1.length; _i++) {
-                var value = values_1[_i];
-                if (!isThenable(value)) {
-                    value = this.resolve(value);
+            try {
+                for (var values_1 = __values(values), values_1_1 = values_1.next(); !values_1_1.done; values_1_1 = values_1.next()) {
+                    var value = values_1_1.value;
+                    if (!isThenable(value)) {
+                        value = this.resolve(value);
+                    }
+                    value.then(onResolve, onReject);
+                }
+            }
+            catch (e_1_1) { e_1 = { error: e_1_1 }; }
+            finally {
+                try {
+                    if (values_1_1 && !values_1_1.done && (_a = values_1.return)) _a.call(values_1);
                 }
-                value.then(onResolve, onReject);
+                finally { if (e_1) throw e_1.error; }
             }
             return promise;
         };
         ZoneAwarePromise.all = function (values) {
+            var e_2, _a;
             var resolve;
             var reject;
             var promise = new this(function (res, rej) {
                 resolve = res;
                 reject = rej;
             });
-            var count = 0;
+            // Start at 2 to prevent prematurely resolving if .then is called immediately.
+            var unresolvedCount = 2;
+            var valueIndex = 0;
             var resolvedValues = [];
-            for (var _i = 0, values_2 = values; _i < values_2.length; _i++) {
-                var value = values_2[_i];
+            var _loop_2 = function (value) {
                 if (!isThenable(value)) {
-                    value = this.resolve(value);
+                    value = this_1.resolve(value);
                 }
-                value.then((function (index) { return function (value) {
-                    resolvedValues[index] = value;
-                    count--;
-                    if (!count) {
+                var curValueIndex = valueIndex;
+                value.then(function (value) {
+                    resolvedValues[curValueIndex] = value;
+                    unresolvedCount--;
+                    if (unresolvedCount === 0) {
                         resolve(resolvedValues);
                     }
-                }; })(count), reject);
-                count++;
+                }, reject);
+                unresolvedCount++;
+                valueIndex++;
+            };
+            var this_1 = this;
+            try {
+                for (var values_2 = __values(values), values_2_1 = values_2.next(); !values_2_1.done; values_2_1 = values_2.next()) {
+                    var value = values_2_1.value;
+                    _loop_2(value);
+                }
+            }
+            catch (e_2_1) { e_2 = { error: e_2_1 }; }
+            finally {
+                try {
+                    if (values_2_1 && !values_2_1.done && (_a = values_2.return)) _a.call(values_2);
+                }
+                finally { if (e_2) throw e_2.error; }
             }
-            if (!count)
+            // Make the unresolvedCount zero-based again.
+            unresolvedCount -= 2;
+            if (unresolvedCount === 0) {
                 resolve(resolvedValues);
+            }
             return promise;
         };
         ZoneAwarePromise.prototype.then = function (onFulfilled, onRejected) {
@@ -1045,31 +1095,112 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
         };
         Ctor[symbolThenPatched] = true;
     }
-    function zoneify(fn) {
-        return function () {
-            var resultPromise = fn.apply(this, arguments);
-            if (resultPromise instanceof ZoneAwarePromise) {
-                return resultPromise;
-            }
-            var ctor = resultPromise.constructor;
-            if (!ctor[symbolThenPatched]) {
-                patchThen(ctor);
-            }
-            return resultPromise;
-        };
-    }
+    api.patchThen = patchThen;
     if (NativePromise) {
         patchThen(NativePromise);
-        var fetch_1 = global['fetch'];
-        if (typeof fetch_1 == 'function') {
-            global['fetch'] = zoneify(fetch_1);
-        }
     }
     // This is not part of public API, but it is useful for tests, so we expose it.
     Promise[Zone.__symbol__('uncaughtPromiseErrors')] = _uncaughtPromiseErrors;
     return ZoneAwarePromise;
 });
 
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+Zone.__load_patch('fetch', function (global, Zone, api) {
+    var fetch = global['fetch'];
+    var ZoneAwarePromise = global.Promise;
+    var symbolThenPatched = api.symbol('thenPatched');
+    var fetchTaskScheduling = api.symbol('fetchTaskScheduling');
+    var fetchTaskAborting = api.symbol('fetchTaskAborting');
+    if (typeof fetch !== 'function') {
+        return;
+    }
+    var OriginalAbortController = global['AbortController'];
+    var supportAbort = typeof OriginalAbortController === 'function';
+    var abortNative = null;
+    if (supportAbort) {
+        global['AbortController'] = function () {
+            var abortController = new OriginalAbortController();
+            var signal = abortController.signal;
+            signal.abortController = abortController;
+            return abortController;
+        };
+        abortNative = api.patchMethod(OriginalAbortController.prototype, 'abort', function (delegate) { return function (self, args) {
+            if (self.task) {
+                return self.task.zone.cancelTask(self.task);
+            }
+            return delegate.apply(self, args);
+        }; });
+    }
+    var placeholder = function () { };
+    global['fetch'] = function () {
+        var _this = this;
+        var args = Array.prototype.slice.call(arguments);
+        var options = args.length > 1 ? args[1] : null;
+        var signal = options && options.signal;
+        return new Promise(function (res, rej) {
+            var task = Zone.current.scheduleMacroTask('fetch', placeholder, args, function () {
+                var fetchPromise;
+                var zone = Zone.current;
+                try {
+                    zone[fetchTaskScheduling] = true;
+                    fetchPromise = fetch.apply(_this, args);
+                }
+                catch (error) {
+                    rej(error);
+                    return;
+                }
+                finally {
+                    zone[fetchTaskScheduling] = false;
+                }
+                if (!(fetchPromise instanceof ZoneAwarePromise)) {
+                    var ctor = fetchPromise.constructor;
+                    if (!ctor[symbolThenPatched]) {
+                        api.patchThen(ctor);
+                    }
+                }
+                fetchPromise.then(function (resource) {
+                    if (task.state !== 'notScheduled') {
+                        task.invoke();
+                    }
+                    res(resource);
+                }, function (error) {
+                    if (task.state !== 'notScheduled') {
+                        task.invoke();
+                    }
+                    rej(error);
+                });
+            }, function () {
+                if (!supportAbort) {
+                    rej('No AbortController supported, can not cancel fetch');
+                    return;
+                }
+                if (signal && signal.abortController && !signal.aborted &&
+                    typeof signal.abortController.abort === 'function' && abortNative) {
+                    try {
+                        Zone.current[fetchTaskAborting] = true;
+                        abortNative.call(signal.abortController);
+                    }
+                    finally {
+                        Zone.current[fetchTaskAborting] = false;
+                    }
+                }
+                else {
+                    rej('cancel fetch need a AbortController.signal');
+                }
+            });
+            if (signal && signal.abortController) {
+                signal.abortController.task = task;
+            }
+        });
+    };
+});
+
 /**
  * @license
  * Copyright Google Inc. All Rights Reserved.
@@ -1185,9 +1316,23 @@ var wrapFn = function (event) {
     }
     var target = this || event.target || _global;
     var listener = target[eventNameSymbol];
-    var result = listener && listener.apply(this, arguments);
-    if (result != undefined && !result) {
-        event.preventDefault();
+    var result;
+    if (isBrowser && target === internalWindow && event.type === 'error') {
+        // window.onerror have different signiture
+        // https://developer.mozilla.org/en-US/docs/Web/API/GlobalEventHandlers/onerror#window.onerror
+        // and onerror callback will prevent default when callback return true
+        var errorEvent = event;
+        result = listener &&
+            listener.call(this, errorEvent.message, errorEvent.filename, errorEvent.lineno, errorEvent.colno, errorEvent.error);
+        if (result === true) {
+            event.preventDefault();
+        }
+    }
+    else {
+        result = listener && listener.apply(this, arguments);
+        if (result != undefined && !result) {
+            event.preventDefault();
+        }
     }
     return result;
 };
@@ -1205,6 +1350,10 @@ function patchProperty(obj, prop, prototype) {
     if (!desc || !desc.configurable) {
         return;
     }
+    var onPropPatchedSymbol = zoneSymbol('on' + prop + 'patched');
+    if (obj.hasOwnProperty(onPropPatchedSymbol) && obj[onPropPatchedSymbol]) {
+        return;
+    }
     // A property descriptor cannot have getter/setter and be writable
     // deleting the writable and value properties avoids this error:
     //
@@ -1282,6 +1431,7 @@ function patchProperty(obj, prop, prototype) {
         return null;
     };
     ObjectDefineProperty(obj, prop, desc);
+    obj[onPropPatchedSymbol] = true;
 }
 function patchOnProperties(obj, properties, prototype) {
     if (properties) {
@@ -1372,6 +1522,31 @@ function patchClass(className) {
         }
     }
 }
+function copySymbolProperties(src, dest) {
+    if (typeof Object.getOwnPropertySymbols !== 'function') {
+        return;
+    }
+    var symbols = Object.getOwnPropertySymbols(src);
+    symbols.forEach(function (symbol) {
+        var desc = Object.getOwnPropertyDescriptor(src, symbol);
+        Object.defineProperty(dest, symbol, {
+            get: function () {
+                return src[symbol];
+            },
+            set: function (value) {
+                if (desc && (!desc.writable || typeof desc.set !== 'function')) {
+                    // if src[symbol] is not writable or not have a setter, just return
+                    return;
+                }
+                src[symbol] = value;
+            },
+            enumerable: desc ? desc.enumerable : true,
+            configurable: desc ? desc.configurable : true
+        });
+    });
+}
+var shouldCopySymbolProperties = false;
+
 function patchMethod(target, name, patchFn) {
     var proto = target;
     while (proto && !proto.hasOwnProperty(name)) {
@@ -1382,7 +1557,7 @@ function patchMethod(target, name, patchFn) {
         proto = target;
     }
     var delegateName = zoneSymbol(name);
-    var delegate;
+    var delegate = null;
     if (proto && !(delegate = proto[delegateName])) {
         delegate = proto[delegateName] = proto[name];
         // check whether proto[name] is writable
@@ -1394,6 +1569,9 @@ function patchMethod(target, name, patchFn) {
                 return patchDelegate_1(this, arguments);
             };
             attachOriginToPatched(proto[name], delegate);
+            if (shouldCopySymbolProperties) {
+                copySymbolProperties(delegate, proto[name]);
+            }
         }
     }
     return delegate;
@@ -1412,7 +1590,7 @@ function patchMacroTask(obj, funcName, metaCreator) {
     setNative = patchMethod(obj, funcName, function (delegate) { return function (self, args) {
         var meta = metaCreator(self, args);
         if (meta.cbIdx >= 0 && typeof args[meta.cbIdx] === 'function') {
-            return scheduleMacroTaskWithCurrentZone(meta.name, args[meta.cbIdx], meta, scheduleTask, null);
+            return scheduleMacroTaskWithCurrentZone(meta.name, args[meta.cbIdx], meta, scheduleTask);
         }
         else {
             // cause an error by calling it directly.
@@ -1426,6 +1604,17 @@ function attachOriginToPatched(patched, original) {
 }
 var isDetectedIEOrEdge = false;
 var ieOrEdge = false;
+function isIE() {
+    try {
+        var ua = internalWindow.navigator.userAgent;
+        if (ua.indexOf('MSIE ') !== -1 || ua.indexOf('Trident/') !== -1) {
+            return true;
+        }
+    }
+    catch (error) {
+    }
+    return false;
+}
 function isIEOrEdge() {
     if (isDetectedIEOrEdge) {
         return ieOrEdge;
@@ -1507,6 +1696,21 @@ Zone.__load_patch('toString', function (global) {
  * @fileoverview
  * @suppress {missingRequire}
  */
+var passiveSupported = false;
+if (typeof window !== 'undefined') {
+    try {
+        var options = Object.defineProperty({}, 'passive', {
+            get: function () {
+                passiveSupported = true;
+            }
+        });
+        window.addEventListener('test', options, options);
+        window.removeEventListener('test', options, options);
+    }
+    catch (err) {
+        passiveSupported = false;
+    }
+}
 // an identifier to tell ZoneTask do not create a new invoke closure
 var OPTIMIZED_ZONE_EVENT_TASK_DATA = {
     useG: true
@@ -1642,6 +1846,7 @@ function patchEventTarget(_global, apis, patchOptions) {
         if (proto[zoneSymbolAddEventListener]) {
             return false;
         }
+        var eventNameToString = patchOptions && patchOptions.eventNameToString;
         // a shared global taskData to pass data for scheduleEventTask
         // so we do not need to create a new object just for pass some data
         var taskData = {};
@@ -1657,12 +1862,24 @@ function patchEventTarget(_global, apis, patchOptions) {
             nativePrependEventListener = proto[zoneSymbol(patchOptions.prepend)] =
                 proto[patchOptions.prepend];
         }
-        var customScheduleGlobal = function () {
+        function checkIsPassive(task) {
+            if (!passiveSupported && typeof taskData.options !== 'boolean' &&
+                typeof taskData.options !== 'undefined' && taskData.options !== null) {
+                // options is a non-null non-undefined object
+                // passive is not supported
+                // don't pass options as object
+                // just pass capture as a boolean
+                task.options = !!taskData.options.capture;
+                taskData.options = task.options;
+            }
+        }
+        var customScheduleGlobal = function (task) {
             // if there is already a task for the eventName + capture,
             // just return, because we use the shared globalZoneAwareCallback here.
             if (taskData.isExisting) {
                 return;
             }
+            checkIsPassive(task);
             return nativeAddEventListener.call(taskData.target, taskData.eventName, taskData.capture ? globalZoneAwareCaptureCallback : globalZoneAwareCallback, taskData.options);
         };
         var customCancelGlobal = function (task) {
@@ -1703,6 +1920,7 @@ function patchEventTarget(_global, apis, patchOptions) {
             return nativeRemoveEventListener.call(task.target, task.eventName, task.capture ? globalZoneAwareCaptureCallback : globalZoneAwareCallback, task.options);
         };
         var customScheduleNonGlobal = function (task) {
+            checkIsPassive(task);
             return nativeAddEventListener.call(taskData.target, taskData.eventName, task.invoke, taskData.options);
         };
         var customSchedulePrepend = function (task) {
@@ -1725,10 +1943,15 @@ function patchEventTarget(_global, apis, patchOptions) {
             if (prepend === void 0) { prepend = false; }
             return function () {
                 var target = this || _global;
+                var eventName = arguments[0];
                 var delegate = arguments[1];
                 if (!delegate) {
                     return nativeListener.apply(this, arguments);
                 }
+                if (isNode && eventName === 'uncaughtException') {
+                    // don't patch uncaughtException of nodejs to prevent endless loop
+                    return nativeListener.apply(this, arguments);
+                }
                 // don't create the bind delegate function for handleEvent
                 // case here to improve addEventListener performance
                 // we will create the bind delegate when invoke
@@ -1742,7 +1965,6 @@ function patchEventTarget(_global, apis, patchOptions) {
                 if (validateHandler && !validateHandler(nativeListener, delegate, target, arguments)) {
                     return;
                 }
-                var eventName = arguments[0];
                 var options = arguments[2];
                 if (blackListedEvents) {
                     // check black list
@@ -1772,8 +1994,8 @@ function patchEventTarget(_global, apis, patchOptions) {
                 var symbolEventName;
                 if (!symbolEventNames) {
                     // the code is duplicate, but I just want to get some better performance
-                    var falseEventName = eventName + FALSE_STR;
-                    var trueEventName = eventName + TRUE_STR;
+                    var falseEventName = (eventNameToString ? eventNameToString(eventName) : eventName) + FALSE_STR;
+                    var trueEventName = (eventNameToString ? eventNameToString(eventName) : eventName) + TRUE_STR;
                     var symbol = ZONE_SYMBOL_PREFIX + falseEventName;
                     var symbolCapture = ZONE_SYMBOL_PREFIX + trueEventName;
                     zoneSymbolEventNames$1[eventName] = {};
@@ -1808,7 +2030,8 @@ function patchEventTarget(_global, apis, patchOptions) {
                     source = targetSource[eventName];
                 }
                 if (!source) {
-                    source = constructorName + addSource + eventName;
+                    source = constructorName + addSource +
+                        (eventNameToString ? eventNameToString(eventName) : eventName);
                 }
                 // do not create a new object as task.data to pass those things
                 // just use the global shared one
@@ -1823,7 +2046,7 @@ function patchEventTarget(_global, apis, patchOptions) {
                 taskData.capture = capture;
                 taskData.eventName = eventName;
                 taskData.isExisting = isExisting;
-                var data = useGlobalCallback ? OPTIMIZED_ZONE_EVENT_TASK_DATA : null;
+                var data = useGlobalCallback ? OPTIMIZED_ZONE_EVENT_TASK_DATA : undefined;
                 // keep taskData into data to allow onScheduleEventTask to access the task information
                 if (data) {
                     data.taskData = taskData;
@@ -1841,7 +2064,11 @@ function patchEventTarget(_global, apis, patchOptions) {
                 if (once) {
                     options.once = true;
                 }
-                task.options = options;
+                if (!(!passiveSupported && typeof task.options === 'boolean')) {
+                    // if not support passive, and we pass an option object
+                    // to addEventListener, we should save the options to task
+                    task.options = options;
+                }
                 task.target = target;
                 task.capture = capture;
                 task.eventName = eventName;
@@ -1926,7 +2153,7 @@ function patchEventTarget(_global, apis, patchOptions) {
             var target = this || _global;
             var eventName = arguments[0];
             var listeners = [];
-            var tasks = findEventTasks(target, eventName);
+            var tasks = findEventTasks(target, eventNameToString ? eventNameToString(eventName) : eventName);
             for (var i = 0; i < tasks.length; i++) {
                 var task = tasks[i];
                 var delegate = task.originalDelegate ? task.originalDelegate : task.callback;
@@ -2082,9 +2309,9 @@ function patchTimer(window, setName, cancelName, nameSuffix) {
         patchMethod(window, setName, function (delegate) { return function (self, args) {
             if (typeof args[0] === 'function') {
                 var options = {
-                    handleId: null,
                     isPeriodic: nameSuffix === 'Interval',
-                    delay: (nameSuffix === 'Timeout' || nameSuffix === 'Interval') ? args[1] || 0 : null,
+                    delay: (nameSuffix === 'Timeout' || nameSuffix === 'Interval') ? args[1] || 0 :
+                        undefined,
                     args: args
                 };
                 var task = scheduleMacroTaskWithCurrentZone(setName, args[0], options, scheduleTask, clearTask);
@@ -2199,7 +2426,7 @@ function propertyPatch() {
     };
     Object.getOwnPropertyDescriptor = function (obj, prop) {
         var desc = _getOwnPropertyDescriptor(obj, prop);
-        if (isUnconfigurable(obj, prop)) {
+        if (desc && isUnconfigurable(obj, prop)) {
             desc.configurable = false;
         }
         return desc;
@@ -2427,10 +2654,10 @@ var globalEventHandlersEventNames = [
     'wheel'
 ];
 var documentEventNames = [
-    'afterscriptexecute', 'beforescriptexecute', 'DOMContentLoaded', 'fullscreenchange',
+    'afterscriptexecute', 'beforescriptexecute', 'DOMContentLoaded', 'freeze', 'fullscreenchange',
     'mozfullscreenchange', 'webkitfullscreenchange', 'msfullscreenchange', 'fullscreenerror',
     'mozfullscreenerror', 'webkitfullscreenerror', 'msfullscreenerror', 'readystatechange',
-    'visibilitychange'
+    'visibilitychange', 'resume'
 ];
 var windowEventNames = [
     'absolutedeviceorientation',
@@ -2542,7 +2769,7 @@ var websocketEventNames = ['close', 'error', 'open', 'message'];
 var workerEventNames = ['error', 'message'];
 var eventNames = globalEventHandlersEventNames.concat(webglEventNames, formEventNames, detailEventNames, documentEventNames, windowEventNames, htmlElementEventNames, ieElementEventNames);
 function filterProperties(target, onProperties, ignoreProperties) {
-    if (!ignoreProperties) {
+    if (!ignoreProperties || ignoreProperties.length === 0) {
         return onProperties;
     }
     var tip = ignoreProperties.filter(function (ip) { return ip.target === target; });
@@ -2567,13 +2794,14 @@ function propertyDescriptorPatch(api, _global) {
     }
     var supportsWebSocket = typeof WebSocket !== 'undefined';
     if (canPatchViaPropertyDescriptor()) {
-        var ignoreProperties = _global.__Zone_ignore_on_properties;
+        var ignoreProperties = _global['__Zone_ignore_on_properties'];
         // for browsers that we can patch the descriptor:  Chrome & Firefox
         if (isBrowser) {
             var internalWindow = window;
+            var ignoreErrorProperties = isIE ? [{ target: internalWindow, ignoreProperties: ['error'] }] : [];
             // in IE/Edge, onProp not exist in window object, but in WindowPrototype
             // so we need to pass WindowPrototype to check onProp exist or not
-            patchFilteredProperties(internalWindow, eventNames.concat(['messageerror']), ignoreProperties, ObjectGetPrototypeOf(internalWindow));
+            patchFilteredProperties(internalWindow, eventNames.concat(['messageerror']), ignoreProperties ? ignoreProperties.concat(ignoreErrorProperties) : ignoreProperties, ObjectGetPrototypeOf(internalWindow));
             patchFilteredProperties(Document.prototype, eventNames, ignoreProperties);
             if (typeof internalWindow['SVGElement'] !== 'undefined') {
                 patchFilteredProperties(internalWindow['SVGElement'].prototype, eventNames, ignoreProperties);
@@ -2595,9 +2823,9 @@ function propertyDescriptorPatch(api, _global) {
             }
         }
         patchFilteredProperties(XMLHttpRequest.prototype, XMLHttpRequestEventNames, ignoreProperties);
-        var XMLHttpRequestEventTarget = _global['XMLHttpRequestEventTarget'];
-        if (XMLHttpRequestEventTarget) {
-            patchFilteredProperties(XMLHttpRequestEventTarget && XMLHttpRequestEventTarget.prototype, XMLHttpRequestEventNames, ignoreProperties);
+        var XMLHttpRequestEventTarget_1 = _global['XMLHttpRequestEventTarget'];
+        if (XMLHttpRequestEventTarget_1) {
+            patchFilteredProperties(XMLHttpRequestEventTarget_1 && XMLHttpRequestEventTarget_1.prototype, XMLHttpRequestEventNames, ignoreProperties);
         }
         if (typeof IDBIndex !== 'undefined') {
             patchFilteredProperties(IDBIndex.prototype, IDBIndexEventNames, ignoreProperties);
@@ -2812,16 +3040,16 @@ function patchEvent(global, api) {
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.io/license
  */
-function registerElementPatch(_global) {
-    if ((!isBrowser && !isMix) || !('registerElement' in _global.document)) {
+function patchCallbacks(target, targetName, method, callbacks) {
+    var symbol = Zone.__symbol__(method);
+    if (target[symbol]) {
         return;
     }
-    var _registerElement = document.registerElement;
-    var callbacks = ['createdCallback', 'attachedCallback', 'detachedCallback', 'attributeChangedCallback'];
-    document.registerElement = function (name, opts) {
+    var nativeDelegate = target[symbol] = target[method];
+    target[method] = function (name, opts, options) {
         if (opts && opts.prototype) {
             callbacks.forEach(function (callback) {
-                var source = 'Document.registerElement::' + callback;
+                var source = targetName + "." + method + "::" + callback;
                 var prototype = opts.prototype;
                 if (prototype.hasOwnProperty(callback)) {
                     var descriptor = ObjectGetOwnPropertyDescriptor(prototype, callback);
@@ -2838,9 +3066,23 @@ function registerElementPatch(_global) {
                 }
             });
         }
-        return _registerElement.call(document, name, opts);
+        return nativeDelegate.call(target, name, opts, options);
     };
-    attachOriginToPatched(document.registerElement, _registerElement);
+    attachOriginToPatched(target[method], nativeDelegate);
+}
+function registerElementPatch(_global) {
+    if ((!isBrowser && !isMix) || !('registerElement' in _global.document)) {
+        return;
+    }
+    var callbacks = ['createdCallback', 'attachedCallback', 'detachedCallback', 'attributeChangedCallback'];
+    patchCallbacks(document, 'Document', 'registerElement', callbacks);
+}
+function patchCustomElements(_global) {
+    if ((!isBrowser && !isMix) || !('customElements' in _global)) {
+        return;
+    }
+    var callbacks = ['connectedCallback', 'disconnectedCallback', 'adoptedCallback', 'attributeChangedCallback'];
+    patchCallbacks(_global.customElements, 'customElements', 'define', callbacks);
 }
 
 /**
@@ -2903,7 +3145,10 @@ Zone.__load_patch('EventTarget', function (global, Zone, api) {
 Zone.__load_patch('on_property', function (global, Zone, api) {
     propertyDescriptorPatch(api, global);
     propertyPatch();
+});
+Zone.__load_patch('customElements', function (global, Zone, api) {
     registerElementPatch(global);
+    patchCustomElements(global);
 });
 Zone.__load_patch('canvas', function (global) {
     var HTMLCanvasElement = global['HTMLCanvasElement'];
@@ -2922,6 +3167,7 @@ Zone.__load_patch('XHR', function (global, Zone) {
     var XHR_LISTENER = zoneSymbol('xhrListener');
     var XHR_SCHEDULED = zoneSymbol('xhrScheduled');
     var XHR_URL = zoneSymbol('xhrURL');
+    var XHR_ERROR_BEFORE_SCHEDULED = zoneSymbol('xhrErrorBeforeScheduled');
     function patchXHR(window) {
         var XMLHttpRequestPrototype = XMLHttpRequest.prototype;
         function findPendingTask(target) {
@@ -2930,9 +3176,9 @@ Zone.__load_patch('XHR', function (global, Zone) {
         var oriAddListener = XMLHttpRequestPrototype[ZONE_SYMBOL_ADD_EVENT_LISTENER];
         var oriRemoveListener = XMLHttpRequestPrototype[ZONE_SYMBOL_REMOVE_EVENT_LISTENER];
         if (!oriAddListener) {
-            var XMLHttpRequestEventTarget = window['XMLHttpRequestEventTarget'];
-            if (XMLHttpRequestEventTarget) {
-                var XMLHttpRequestEventTargetPrototype = XMLHttpRequestEventTarget.prototype;
+            var XMLHttpRequestEventTarget_1 = window['XMLHttpRequestEventTarget'];
+            if (XMLHttpRequestEventTarget_1) {
+                var XMLHttpRequestEventTargetPrototype = XMLHttpRequestEventTarget_1.prototype;
                 oriAddListener = XMLHttpRequestEventTargetPrototype[ZONE_SYMBOL_ADD_EVENT_LISTENER];
                 oriRemoveListener = XMLHttpRequestEventTargetPrototype[ZONE_SYMBOL_REMOVE_EVENT_LISTENER];
             }
@@ -2940,9 +3186,10 @@ Zone.__load_patch('XHR', function (global, Zone) {
         var READY_STATE_CHANGE = 'readystatechange';
         var SCHEDULED = 'scheduled';
         function scheduleTask(task) {
-            XMLHttpRequest[XHR_SCHEDULED] = false;
             var data = task.data;
             var target = data.target;
+            target[XHR_SCHEDULED] = false;
+            target[XHR_ERROR_BEFORE_SCHEDULED] = false;
             // remove existing event listener
             var listener = target[XHR_LISTENER];
             if (!oriAddListener) {
@@ -2956,8 +3203,35 @@ Zone.__load_patch('XHR', function (global, Zone) {
                 if (target.readyState === target.DONE) {
                     // sometimes on some browsers XMLHttpRequest will fire onreadystatechange with
                     // readyState=4 multiple times, so we need to check task state here
-                    if (!data.aborted && XMLHttpRequest[XHR_SCHEDULED] && task.state === SCHEDULED) {
-                        task.invoke();
+                    if (!data.aborted && target[XHR_SCHEDULED] && task.state === SCHEDULED) {
+                        // check whether the xhr has registered onload listener
+                        // if that is the case, the task should invoke after all
+                        // onload listeners finish.
+                        var loadTasks = target['__zone_symbol__loadfalse'];
+                        if (loadTasks && loadTasks.length > 0) {
+                            var oriInvoke_1 = task.invoke;
+                            task.invoke = function () {
+                                // need to load the tasks again, because in other
+                                // load listener, they may remove themselves
+                                var loadTasks = target['__zone_symbol__loadfalse'];
+                                for (var i = 0; i < loadTasks.length; i++) {
+                                    if (loadTasks[i] === task) {
+                                        loadTasks.splice(i, 1);
+                                    }
+                                }
+                                if (!data.aborted && task.state === SCHEDULED) {
+                                    oriInvoke_1.call(task);
+                                }
+                            };
+                            loadTasks.push(task);
+                        }
+                        else {
+                            task.invoke();
+                        }
+                    }
+                    else if (!data.aborted && target[XHR_SCHEDULED] === false) {
+                        // error occurs when xhr.send()
+                        target[XHR_ERROR_BEFORE_SCHEDULED] = true;
                     }
                 }
             };
@@ -2967,7 +3241,7 @@ Zone.__load_patch('XHR', function (global, Zone) {
                 target[XHR_TASK] = task;
             }
             sendNative.apply(target, data.args);
-            XMLHttpRequest[XHR_SCHEDULED] = true;
+            target[XHR_SCHEDULED] = true;
             return task;
         }
         function placeholderCallback() { }
@@ -2984,24 +3258,32 @@ Zone.__load_patch('XHR', function (global, Zone) {
             return openNative.apply(self, args);
         }; });
         var XMLHTTPREQUEST_SOURCE = 'XMLHttpRequest.send';
+        var fetchTaskAborting = zoneSymbol('fetchTaskAborting');
+        var fetchTaskScheduling = zoneSymbol('fetchTaskScheduling');
         var sendNative = patchMethod(XMLHttpRequestPrototype, 'send', function () { return function (self, args) {
+            if (Zone.current[fetchTaskScheduling] === true) {
+                // a fetch is scheduling, so we are using xhr to polyfill fetch
+                // and because we already schedule macroTask for fetch, we should
+                // not schedule a macroTask for xhr again
+                return sendNative.apply(self, args);
+            }
             if (self[XHR_SYNC]) {
                 // if the XHR is sync there is no task to schedule, just execute the code.
                 return sendNative.apply(self, args);
             }
             else {
-                var options = {
-                    target: self,
-                    url: self[XHR_URL],
-                    isPeriodic: false,
-                    delay: null,
-                    args: args,
-                    aborted: false
-                };
-                return scheduleMacroTaskWithCurrentZone(XMLHTTPREQUEST_SOURCE, placeholderCallback, options, scheduleTask, clearTask);
+                var options = { target: self, url: self[XHR_URL], isPeriodic: false, args: args, aborted: false };
+                var task = scheduleMacroTaskWithCurrentZone(XMLHTTPREQUEST_SOURCE, placeholderCallback, options, scheduleTask, clearTask);
+                if (self && self[XHR_ERROR_BEFORE_SCHEDULED] === true && !options.aborted &&
+                    task.state === SCHEDULED) {
+                    // xhr request throw error when send
+                    // we should invoke task instead of leaving a scheduled
+                    // pending macroTask
+                    task.invoke();
+                }
             }
         }; });
-        var abortNative = patchMethod(XMLHttpRequestPrototype, 'abort', function () { return function (self) {
+        var abortNative = patchMethod(XMLHttpRequestPrototype, 'abort', function () { return function (self, args) {
             var task = findPendingTask(self);
             if (task && typeof task.type == 'string') {
                 // If the XHR has already completed, do nothing.
@@ -3013,6 +3295,10 @@ Zone.__load_patch('XHR', function (global, Zone) {
                 }
                 task.zone.cancelTask(task);
             }
+            else if (Zone.current[fetchTaskAborting] === true) {
+                // the abort is called from fetch polyfill, we need to call native abort of XHR.
+                return abortNative.apply(self, args);
+            }
             // Otherwise, we are trying to abort an XHR which has not yet been sent, so there is no
             // task
             // to cancel. Do nothing.
@@ -3229,6 +3515,7 @@ var ProxyZoneSpec = /** @class */ (function () {
         if (defaultSpecDelegate === void 0) { defaultSpecDelegate = null; }
         this.defaultSpecDelegate = defaultSpecDelegate;
         this.name = 'ProxyZone';
+        this._delegateSpec = null;
         this.properties = { 'ProxyZoneSpec': this };
         this.propertyKeys = null;
         this.lastTaskState = null;
@@ -4031,7 +4318,11 @@ var __spread = (undefined && undefined.__spread) || function () {
                     }
                 }
             }
+            lastCurrentTime = this._currentTime;
             this._currentTime = finalTime;
+            if (doTick) {
+                doTick(this._currentTime - lastCurrentTime);
+            }
         };
         Scheduler.prototype.flush = function (limit, flushPeriodic, doTick) {
             if (limit === void 0) { limit = 20; }
@@ -4120,14 +4411,14 @@ var __spread = (undefined && undefined.__spread) || function () {
                     args[_i] = arguments[_i];
                 }
                 fn.apply(global, args);
-                if (_this._lastError === null) {
+                if (_this._lastError === null) { // Success
                     if (completers.onSuccess != null) {
                         completers.onSuccess.apply(global);
                     }
                     // Flush microtasks only on success.
                     _this.flushMicrotasks();
                 }
-                else {
+                else { // Failure
                     if (completers.onError != null) {
                         completers.onError.apply(global);
                     }
@@ -4426,23 +4717,23 @@ Zone.__load_patch('fakeasync', function (global, Zone, api) {
         ProxyZoneSpec && ProxyZoneSpec.assertPresent().resetDelegate();
     }
     /**
-    * Wraps a function to be executed in the fakeAsync zone:
-    * - microtasks are manually executed by calling `flushMicrotasks()`,
-    * - timers are synchronous, `tick()` simulates the asynchronous passage of time.
-    *
-    * If there are any pending timers at the end of the function, an exception will be thrown.
-    *
-    * Can be used to wrap inject() calls.
-    *
-    * ## Example
-    *
-    * {@example core/testing/ts/fake_async.ts region='basic'}
-    *
-    * @param fn
-    * @returns The function wrapped to be executed in the fakeAsync zone
-    *
-    * @experimental
-    */
+     * Wraps a function to be executed in the fakeAsync zone:
+     * - microtasks are manually executed by calling `flushMicrotasks()`,
+     * - timers are synchronous, `tick()` simulates the asynchronous passage of time.
+     *
+     * If there are any pending timers at the end of the function, an exception will be thrown.
+     *
+     * Can be used to wrap inject() calls.
+     *
+     * ## Example
+     *
+     * {@example core/testing/ts/fake_async.ts region='basic'}
+     *
+     * @param fn
+     * @returns The function wrapped to be executed in the fakeAsync zone
+     *
+     * @experimental
+     */
     function fakeAsync(fn) {
         // Not using an arrow function to preserve context passed from call site
         return function () {
diff --git a/dist/zone-testing-node-bundle.js b/dist/zone-testing-node-bundle.js
index a95fbf996..5347637e2 100644
--- a/dist/zone-testing-node-bundle.js
+++ b/dist/zone-testing-node-bundle.js
@@ -19,7 +19,6 @@
  * found in the LICENSE file at https://angular.io/license
  */
 var Zone$1 = (function (global) {
-    var FUNCTION = 'function';
     var performance = global['performance'];
     function mark(name) {
         performance && performance['mark'] && performance['mark'](name);
@@ -28,12 +27,26 @@ var Zone$1 = (function (global) {
         performance && performance['measure'] && performance['measure'](name, label);
     }
     mark('Zone');
+    var checkDuplicate = global[('__zone_symbol__forceDuplicateZoneCheck')] === true;
     if (global['Zone']) {
-        throw new Error('Zone already loaded.');
+        // if global['Zone'] already exists (maybe zone.js was already loaded or
+        // some other lib also registered a global object named Zone), we may need
+        // to throw an error, but sometimes user may not want this error.
+        // For example,
+        // we have two web pages, page1 includes zone.js, page2 doesn't.
+        // and the 1st time user load page1 and page2, everything work fine,
+        // but when user load page2 again, error occurs because global['Zone'] already exists.
+        // so we add a flag to let user choose whether to throw this error or not.
+        // By default, if existing Zone is from zone.js, we will not throw the error.
+        if (checkDuplicate || typeof global['Zone'].__symbol__ !== 'function') {
+            throw new Error('Zone already loaded.');
+        }
+        else {
+            return global['Zone'];
+        }
     }
     var Zone = /** @class */ (function () {
         function Zone(parent, zoneSpec) {
-            this._properties = null;
             this._parent = parent;
             this._name = zoneSpec ? zoneSpec.name || 'unnamed' : '<root>';
             this._properties = zoneSpec && zoneSpec.properties || {};
@@ -76,7 +89,9 @@ var Zone$1 = (function (global) {
         });
         Zone.__load_patch = function (name, fn) {
             if (patches.hasOwnProperty(name)) {
-                throw Error('Already loaded patch: ' + name);
+                if (checkDuplicate) {
+                    throw Error('Already loaded patch: ' + name);
+                }
             }
             else if (!global['__Zone_disable_' + name]) {
                 var perfName = 'Zone:' + name;
@@ -120,7 +135,7 @@ var Zone$1 = (function (global) {
             return this._zoneDelegate.fork(this, zoneSpec);
         };
         Zone.prototype.wrap = function (callback, source) {
-            if (typeof callback !== FUNCTION) {
+            if (typeof callback !== 'function') {
                 throw new Error('Expecting function got: ' + callback);
             }
             var _callback = this._zoneDelegate.intercept(this, callback, source);
@@ -130,9 +145,6 @@ var Zone$1 = (function (global) {
             };
         };
         Zone.prototype.run = function (callback, applyThis, applyArgs, source) {
-            if (applyThis === void 0) { applyThis = undefined; }
-            if (applyArgs === void 0) { applyArgs = null; }
-            if (source === void 0) { source = null; }
             _currentZoneFrame = { parent: _currentZoneFrame, zone: this };
             try {
                 return this._zoneDelegate.invoke(this, callback, applyThis, applyArgs, source);
@@ -143,8 +155,6 @@ var Zone$1 = (function (global) {
         };
         Zone.prototype.runGuarded = function (callback, applyThis, applyArgs, source) {
             if (applyThis === void 0) { applyThis = null; }
-            if (applyArgs === void 0) { applyArgs = null; }
-            if (source === void 0) { source = null; }
             _currentZoneFrame = { parent: _currentZoneFrame, zone: this };
             try {
                 try {
@@ -168,10 +178,7 @@ var Zone$1 = (function (global) {
             // https://github.com/angular/zone.js/issues/778, sometimes eventTask
             // will run in notScheduled(canceled) state, we should not try to
             // run such kind of task but just return
-            // we have to define an variable here, if not
-            // typescript compiler will complain below
-            var isNotScheduled = task.state === notScheduled;
-            if (isNotScheduled && task.type === eventTask) {
+            if (task.state === notScheduled && (task.type === eventTask || task.type === macroTask)) {
                 return;
             }
             var reEntryGuard = task.state != running;
@@ -182,7 +189,7 @@ var Zone$1 = (function (global) {
             _currentZoneFrame = { parent: _currentZoneFrame, zone: this };
             try {
                 if (task.type == macroTask && task.data && !task.data.isPeriodic) {
-                    task.cancelFn = null;
+                    task.cancelFn = undefined;
                 }
                 try {
                     return this._zoneDelegate.invokeTask(this, task, applyThis, applyArgs);
@@ -218,8 +225,7 @@ var Zone$1 = (function (global) {
                 var newZone = this;
                 while (newZone) {
                     if (newZone === task.zone) {
-                        throw Error("can not reschedule task to " + this
-                            .name + " which is descendants of the original zone " + task.zone.name);
+                        throw Error("can not reschedule task to " + this.name + " which is descendants of the original zone " + task.zone.name);
                     }
                     newZone = newZone.parent;
                 }
@@ -249,7 +255,7 @@ var Zone$1 = (function (global) {
             return task;
         };
         Zone.prototype.scheduleMicroTask = function (source, callback, data, customSchedule) {
-            return this.scheduleTask(new ZoneTask(microTask, source, callback, data, customSchedule, null));
+            return this.scheduleTask(new ZoneTask(microTask, source, callback, data, customSchedule, undefined));
         };
         Zone.prototype.scheduleMacroTask = function (source, callback, data, customSchedule, customCancel) {
             return this.scheduleTask(new ZoneTask(macroTask, source, callback, data, customSchedule, customCancel));
@@ -290,16 +296,14 @@ var Zone$1 = (function (global) {
     }());
     var DELEGATE_ZS = {
         name: '',
-        onHasTask: function (delegate, _, target, hasTaskState) {
-            return delegate.hasTask(target, hasTaskState);
-        },
+        onHasTask: function (delegate, _, target, hasTaskState) { return delegate.hasTask(target, hasTaskState); },
         onScheduleTask: function (delegate, _, target, task) {
             return delegate.scheduleTask(target, task);
         },
-        onInvokeTask: function (delegate, _, target, task, applyThis, applyArgs) { return delegate.invokeTask(target, task, applyThis, applyArgs); },
-        onCancelTask: function (delegate, _, target, task) {
-            return delegate.cancelTask(target, task);
-        }
+        onInvokeTask: function (delegate, _, target, task, applyThis, applyArgs) {
+            return delegate.invokeTask(target, task, applyThis, applyArgs);
+        },
+        onCancelTask: function (delegate, _, target, task) { return delegate.cancelTask(target, task); }
     };
     var ZoneDelegate = /** @class */ (function () {
         function ZoneDelegate(zone, parentDelegate, zoneSpec) {
@@ -327,8 +331,8 @@ var Zone$1 = (function (global) {
                 zoneSpec && (zoneSpec.onHandleError ? this.zone : parentDelegate.zone);
             this._scheduleTaskZS =
                 zoneSpec && (zoneSpec.onScheduleTask ? zoneSpec : parentDelegate._scheduleTaskZS);
-            this._scheduleTaskDlgt =
-                zoneSpec && (zoneSpec.onScheduleTask ? parentDelegate : parentDelegate._scheduleTaskDlgt);
+            this._scheduleTaskDlgt = zoneSpec &&
+                (zoneSpec.onScheduleTask ? parentDelegate : parentDelegate._scheduleTaskDlgt);
             this._scheduleTaskCurrZone =
                 zoneSpec && (zoneSpec.onScheduleTask ? this.zone : parentDelegate.zone);
             this._invokeTaskZS =
@@ -383,8 +387,7 @@ var Zone$1 = (function (global) {
                 callback;
         };
         ZoneDelegate.prototype.invoke = function (targetZone, callback, applyThis, applyArgs, source) {
-            return this._invokeZS ?
-                this._invokeZS.onInvoke(this._invokeDlgt, this._invokeCurrZone, targetZone, callback, applyThis, applyArgs, source) :
+            return this._invokeZS ? this._invokeZS.onInvoke(this._invokeDlgt, this._invokeCurrZone, targetZone, callback, applyThis, applyArgs, source) :
                 callback.apply(applyThis, applyArgs);
         };
         ZoneDelegate.prototype.handleError = function (targetZone, error) {
@@ -416,8 +419,7 @@ var Zone$1 = (function (global) {
             return returnTask;
         };
         ZoneDelegate.prototype.invokeTask = function (targetZone, task, applyThis, applyArgs) {
-            return this._invokeTaskZS ?
-                this._invokeTaskZS.onInvokeTask(this._invokeTaskDlgt, this._invokeTaskCurrZone, targetZone, task, applyThis, applyArgs) :
+            return this._invokeTaskZS ? this._invokeTaskZS.onInvokeTask(this._invokeTaskDlgt, this._invokeTaskCurrZone, targetZone, task, applyThis, applyArgs) :
                 task.callback.apply(applyThis, applyArgs);
         };
         ZoneDelegate.prototype.cancelTask = function (targetZone, task) {
@@ -437,7 +439,7 @@ var Zone$1 = (function (global) {
             // hasTask should not throw error so other ZoneDelegate
             // can still trigger hasTask callback
             try {
-                return this._hasTaskZS &&
+                this._hasTaskZS &&
                     this._hasTaskZS.onHasTask(this._hasTaskDlgt, this._hasTaskCurrZone, targetZone, isEmpty);
             }
             catch (err) {
@@ -527,14 +529,12 @@ var Zone$1 = (function (global) {
                 }
             }
             else {
-                throw new Error(this.type + " '" + this.source + "': can not transition to '" + toState + "', expecting state '" + fromState1 + "'" + (fromState2 ?
-                    ' or \'' + fromState2 + '\'' :
-                    '') + ", was '" + this._state + "'.");
+                throw new Error(this.type + " '" + this.source + "': can not transition to '" + toState + "', expecting state '" + fromState1 + "'" + (fromState2 ? ' or \'' + fromState2 + '\'' : '') + ", was '" + this._state + "'.");
             }
         };
         ZoneTask.prototype.toString = function () {
             if (this.data && typeof this.data.handleId !== 'undefined') {
-                return this.data.handleId;
+                return this.data.handleId.toString();
             }
             else {
                 return Object.prototype.toString.call(this);
@@ -575,7 +575,13 @@ var Zone$1 = (function (global) {
                 }
             }
             if (nativeMicroTaskQueuePromise) {
-                nativeMicroTaskQueuePromise[symbolThen](drainMicroTaskQueue);
+                var nativeThen = nativeMicroTaskQueuePromise[symbolThen];
+                if (!nativeThen) {
+                    // native Promise is not patchable, we need to use `then` directly
+                    // issue 1078
+                    nativeThen = nativeMicroTaskQueuePromise['then'];
+                }
+                nativeThen.call(nativeMicroTaskQueuePromise, drainMicroTaskQueue);
             }
             else {
                 global[symbolSetTimeout](drainMicroTaskQueue, 0);
@@ -622,12 +628,13 @@ var Zone$1 = (function (global) {
         patchEventTarget: function () { return []; },
         patchOnProperties: noop,
         patchMethod: function () { return noop; },
-        bindArguments: function () { return null; },
+        bindArguments: function () { return []; },
+        patchThen: function () { return noop; },
         setNativePromise: function (NativePromise) {
             // sometimes NativePromise.resolve static function
             // is not ready yet, (such as core-js/es6.promise)
             // so we need to check here.
-            if (NativePromise && typeof NativePromise.resolve === FUNCTION) {
+            if (NativePromise && typeof NativePromise.resolve === 'function') {
                 nativeMicroTaskQueuePromise = NativePromise.resolve(0);
             }
         },
@@ -643,6 +650,16 @@ var Zone$1 = (function (global) {
     return global['Zone'] = Zone;
 })(typeof window !== 'undefined' && window || typeof self !== 'undefined' && self || global);
 
+var __values = (undefined && undefined.__values) || function (o) {
+    var m = typeof Symbol === "function" && o[Symbol.iterator], i = 0;
+    if (m) return m.call(o);
+    return {
+        next: function () {
+            if (o && i >= o.length) o = void 0;
+            return { value: o && o[i++], done: !o };
+        }
+    };
+};
 Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
     var ObjectGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
     var ObjectDefineProperty = Object.defineProperty;
@@ -785,7 +802,7 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
                 var queue = promise[symbolValue];
                 promise[symbolValue] = value;
                 if (promise[symbolFinally] === symbolFinally) {
-                    // the promise is generated by Promise.prototype.finally          
+                    // the promise is generated by Promise.prototype.finally
                     if (state === RESOLVED) {
                         // the state is resolved, should ignore the value
                         // and use parent promise value
@@ -869,7 +886,9 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
                     chainPromise[symbolParentPromiseState] = promiseState;
                 }
                 // should not pass value to finally callback
-                var value = zone.run(delegate, undefined, isFinallyPromise && delegate !== forwardRejection && delegate !== forwardResolution ? [] : [parentPromiseValue]);
+                var value = zone.run(delegate, undefined, isFinallyPromise && delegate !== forwardRejection && delegate !== forwardResolution ?
+                    [] :
+                    [parentPromiseValue]);
                 resolvePromise(chainPromise, true, value);
             }
             catch (error) {
@@ -904,6 +923,7 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
             return resolvePromise(new this(null), REJECTED, error);
         };
         ZoneAwarePromise.race = function (values) {
+            var e_1, _a;
             var resolve;
             var reject;
             var promise = new this(function (res, rej) {
@@ -916,40 +936,70 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
             function onReject(error) {
                 promise && (promise = null || reject(error));
             }
-            for (var _i = 0, values_1 = values; _i < values_1.length; _i++) {
-                var value = values_1[_i];
-                if (!isThenable(value)) {
-                    value = this.resolve(value);
+            try {
+                for (var values_1 = __values(values), values_1_1 = values_1.next(); !values_1_1.done; values_1_1 = values_1.next()) {
+                    var value = values_1_1.value;
+                    if (!isThenable(value)) {
+                        value = this.resolve(value);
+                    }
+                    value.then(onResolve, onReject);
                 }
-                value.then(onResolve, onReject);
+            }
+            catch (e_1_1) { e_1 = { error: e_1_1 }; }
+            finally {
+                try {
+                    if (values_1_1 && !values_1_1.done && (_a = values_1.return)) _a.call(values_1);
+                }
+                finally { if (e_1) throw e_1.error; }
             }
             return promise;
         };
         ZoneAwarePromise.all = function (values) {
+            var e_2, _a;
             var resolve;
             var reject;
             var promise = new this(function (res, rej) {
                 resolve = res;
                 reject = rej;
             });
-            var count = 0;
+            // Start at 2 to prevent prematurely resolving if .then is called immediately.
+            var unresolvedCount = 2;
+            var valueIndex = 0;
             var resolvedValues = [];
-            for (var _i = 0, values_2 = values; _i < values_2.length; _i++) {
-                var value = values_2[_i];
+            var _loop_2 = function (value) {
                 if (!isThenable(value)) {
-                    value = this.resolve(value);
+                    value = this_1.resolve(value);
                 }
-                value.then((function (index) { return function (value) {
-                    resolvedValues[index] = value;
-                    count--;
-                    if (!count) {
+                var curValueIndex = valueIndex;
+                value.then(function (value) {
+                    resolvedValues[curValueIndex] = value;
+                    unresolvedCount--;
+                    if (unresolvedCount === 0) {
                         resolve(resolvedValues);
                     }
-                }; })(count), reject);
-                count++;
+                }, reject);
+                unresolvedCount++;
+                valueIndex++;
+            };
+            var this_1 = this;
+            try {
+                for (var values_2 = __values(values), values_2_1 = values_2.next(); !values_2_1.done; values_2_1 = values_2.next()) {
+                    var value = values_2_1.value;
+                    _loop_2(value);
+                }
             }
-            if (!count)
+            catch (e_2_1) { e_2 = { error: e_2_1 }; }
+            finally {
+                try {
+                    if (values_2_1 && !values_2_1.done && (_a = values_2.return)) _a.call(values_2);
+                }
+                finally { if (e_2) throw e_2.error; }
+            }
+            // Make the unresolvedCount zero-based again.
+            unresolvedCount -= 2;
+            if (unresolvedCount === 0) {
                 resolve(resolvedValues);
+            }
             return promise;
         };
         ZoneAwarePromise.prototype.then = function (onFulfilled, onRejected) {
@@ -1045,25 +1095,9 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
         };
         Ctor[symbolThenPatched] = true;
     }
-    function zoneify(fn) {
-        return function () {
-            var resultPromise = fn.apply(this, arguments);
-            if (resultPromise instanceof ZoneAwarePromise) {
-                return resultPromise;
-            }
-            var ctor = resultPromise.constructor;
-            if (!ctor[symbolThenPatched]) {
-                patchThen(ctor);
-            }
-            return resultPromise;
-        };
-    }
+    api.patchThen = patchThen;
     if (NativePromise) {
         patchThen(NativePromise);
-        var fetch_1 = global['fetch'];
-        if (typeof fetch_1 == 'function') {
-            global['fetch'] = zoneify(fetch_1);
-        }
     }
     // This is not part of public API, but it is useful for tests, so we expose it.
     Promise[Zone.__symbol__('uncaughtPromiseErrors')] = _uncaughtPromiseErrors;
@@ -1163,9 +1197,23 @@ var wrapFn = function (event) {
     }
     var target = this || event.target || _global;
     var listener = target[eventNameSymbol];
-    var result = listener && listener.apply(this, arguments);
-    if (result != undefined && !result) {
-        event.preventDefault();
+    var result;
+    if (isBrowser && target === internalWindow && event.type === 'error') {
+        // window.onerror have different signiture
+        // https://developer.mozilla.org/en-US/docs/Web/API/GlobalEventHandlers/onerror#window.onerror
+        // and onerror callback will prevent default when callback return true
+        var errorEvent = event;
+        result = listener &&
+            listener.call(this, errorEvent.message, errorEvent.filename, errorEvent.lineno, errorEvent.colno, errorEvent.error);
+        if (result === true) {
+            event.preventDefault();
+        }
+    }
+    else {
+        result = listener && listener.apply(this, arguments);
+        if (result != undefined && !result) {
+            event.preventDefault();
+        }
     }
     return result;
 };
@@ -1183,6 +1231,10 @@ function patchProperty(obj, prop, prototype) {
     if (!desc || !desc.configurable) {
         return;
     }
+    var onPropPatchedSymbol = zoneSymbol('on' + prop + 'patched');
+    if (obj.hasOwnProperty(onPropPatchedSymbol) && obj[onPropPatchedSymbol]) {
+        return;
+    }
     // A property descriptor cannot have getter/setter and be writable
     // deleting the writable and value properties avoids this error:
     //
@@ -1260,6 +1312,7 @@ function patchProperty(obj, prop, prototype) {
         return null;
     };
     ObjectDefineProperty(obj, prop, desc);
+    obj[onPropPatchedSymbol] = true;
 }
 function patchOnProperties(obj, properties, prototype) {
     if (properties) {
@@ -1282,6 +1335,33 @@ function patchOnProperties(obj, properties, prototype) {
 var originalInstanceKey = zoneSymbol('originalInstance');
 // wrap some native API on `window`
 
+function copySymbolProperties(src, dest) {
+    if (typeof Object.getOwnPropertySymbols !== 'function') {
+        return;
+    }
+    var symbols = Object.getOwnPropertySymbols(src);
+    symbols.forEach(function (symbol) {
+        var desc = Object.getOwnPropertyDescriptor(src, symbol);
+        Object.defineProperty(dest, symbol, {
+            get: function () {
+                return src[symbol];
+            },
+            set: function (value) {
+                if (desc && (!desc.writable || typeof desc.set !== 'function')) {
+                    // if src[symbol] is not writable or not have a setter, just return
+                    return;
+                }
+                src[symbol] = value;
+            },
+            enumerable: desc ? desc.enumerable : true,
+            configurable: desc ? desc.configurable : true
+        });
+    });
+}
+var shouldCopySymbolProperties = false;
+function setShouldCopySymbolProperties(flag) {
+    shouldCopySymbolProperties = flag;
+}
 function patchMethod(target, name, patchFn) {
     var proto = target;
     while (proto && !proto.hasOwnProperty(name)) {
@@ -1292,7 +1372,7 @@ function patchMethod(target, name, patchFn) {
         proto = target;
     }
     var delegateName = zoneSymbol(name);
-    var delegate;
+    var delegate = null;
     if (proto && !(delegate = proto[delegateName])) {
         delegate = proto[delegateName] = proto[name];
         // check whether proto[name] is writable
@@ -1304,6 +1384,9 @@ function patchMethod(target, name, patchFn) {
                 return patchDelegate_1(this, arguments);
             };
             attachOriginToPatched(proto[name], delegate);
+            if (shouldCopySymbolProperties) {
+                copySymbolProperties(delegate, proto[name]);
+            }
         }
     }
     return delegate;
@@ -1322,7 +1405,7 @@ function patchMacroTask(obj, funcName, metaCreator) {
     setNative = patchMethod(obj, funcName, function (delegate) { return function (self, args) {
         var meta = metaCreator(self, args);
         if (meta.cbIdx >= 0 && typeof args[meta.cbIdx] === 'function') {
-            return scheduleMacroTaskWithCurrentZone(meta.name, args[meta.cbIdx], meta, scheduleTask, null);
+            return scheduleMacroTaskWithCurrentZone(meta.name, args[meta.cbIdx], meta, scheduleTask);
         }
         else {
             // cause an error by calling it directly.
@@ -1409,6 +1492,20 @@ Zone.__load_patch('toString', function (global) {
     };
 });
 
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+Zone.__load_patch('node_util', function (global, Zone, api) {
+    api.patchOnProperties = patchOnProperties;
+    api.patchMethod = patchMethod;
+    api.bindArguments = bindArguments;
+    setShouldCopySymbolProperties(true);
+});
+
 /**
  * @license
  * Copyright Google Inc. All Rights Reserved.
@@ -1420,6 +1517,21 @@ Zone.__load_patch('toString', function (global) {
  * @fileoverview
  * @suppress {missingRequire}
  */
+var passiveSupported = false;
+if (typeof window !== 'undefined') {
+    try {
+        var options = Object.defineProperty({}, 'passive', {
+            get: function () {
+                passiveSupported = true;
+            }
+        });
+        window.addEventListener('test', options, options);
+        window.removeEventListener('test', options, options);
+    }
+    catch (err) {
+        passiveSupported = false;
+    }
+}
 // an identifier to tell ZoneTask do not create a new invoke closure
 var OPTIMIZED_ZONE_EVENT_TASK_DATA = {
     useG: true
@@ -1555,6 +1667,7 @@ function patchEventTarget(_global, apis, patchOptions) {
         if (proto[zoneSymbolAddEventListener]) {
             return false;
         }
+        var eventNameToString = patchOptions && patchOptions.eventNameToString;
         // a shared global taskData to pass data for scheduleEventTask
         // so we do not need to create a new object just for pass some data
         var taskData = {};
@@ -1570,12 +1683,24 @@ function patchEventTarget(_global, apis, patchOptions) {
             nativePrependEventListener = proto[zoneSymbol(patchOptions.prepend)] =
                 proto[patchOptions.prepend];
         }
-        var customScheduleGlobal = function () {
+        function checkIsPassive(task) {
+            if (!passiveSupported && typeof taskData.options !== 'boolean' &&
+                typeof taskData.options !== 'undefined' && taskData.options !== null) {
+                // options is a non-null non-undefined object
+                // passive is not supported
+                // don't pass options as object
+                // just pass capture as a boolean
+                task.options = !!taskData.options.capture;
+                taskData.options = task.options;
+            }
+        }
+        var customScheduleGlobal = function (task) {
             // if there is already a task for the eventName + capture,
             // just return, because we use the shared globalZoneAwareCallback here.
             if (taskData.isExisting) {
                 return;
             }
+            checkIsPassive(task);
             return nativeAddEventListener.call(taskData.target, taskData.eventName, taskData.capture ? globalZoneAwareCaptureCallback : globalZoneAwareCallback, taskData.options);
         };
         var customCancelGlobal = function (task) {
@@ -1616,6 +1741,7 @@ function patchEventTarget(_global, apis, patchOptions) {
             return nativeRemoveEventListener.call(task.target, task.eventName, task.capture ? globalZoneAwareCaptureCallback : globalZoneAwareCallback, task.options);
         };
         var customScheduleNonGlobal = function (task) {
+            checkIsPassive(task);
             return nativeAddEventListener.call(taskData.target, taskData.eventName, task.invoke, taskData.options);
         };
         var customSchedulePrepend = function (task) {
@@ -1638,10 +1764,15 @@ function patchEventTarget(_global, apis, patchOptions) {
             if (prepend === void 0) { prepend = false; }
             return function () {
                 var target = this || _global;
+                var eventName = arguments[0];
                 var delegate = arguments[1];
                 if (!delegate) {
                     return nativeListener.apply(this, arguments);
                 }
+                if (isNode && eventName === 'uncaughtException') {
+                    // don't patch uncaughtException of nodejs to prevent endless loop
+                    return nativeListener.apply(this, arguments);
+                }
                 // don't create the bind delegate function for handleEvent
                 // case here to improve addEventListener performance
                 // we will create the bind delegate when invoke
@@ -1655,7 +1786,6 @@ function patchEventTarget(_global, apis, patchOptions) {
                 if (validateHandler && !validateHandler(nativeListener, delegate, target, arguments)) {
                     return;
                 }
-                var eventName = arguments[0];
                 var options = arguments[2];
                 if (blackListedEvents) {
                     // check black list
@@ -1685,8 +1815,8 @@ function patchEventTarget(_global, apis, patchOptions) {
                 var symbolEventName;
                 if (!symbolEventNames) {
                     // the code is duplicate, but I just want to get some better performance
-                    var falseEventName = eventName + FALSE_STR;
-                    var trueEventName = eventName + TRUE_STR;
+                    var falseEventName = (eventNameToString ? eventNameToString(eventName) : eventName) + FALSE_STR;
+                    var trueEventName = (eventNameToString ? eventNameToString(eventName) : eventName) + TRUE_STR;
                     var symbol = ZONE_SYMBOL_PREFIX + falseEventName;
                     var symbolCapture = ZONE_SYMBOL_PREFIX + trueEventName;
                     zoneSymbolEventNames$1[eventName] = {};
@@ -1721,7 +1851,8 @@ function patchEventTarget(_global, apis, patchOptions) {
                     source = targetSource[eventName];
                 }
                 if (!source) {
-                    source = constructorName + addSource + eventName;
+                    source = constructorName + addSource +
+                        (eventNameToString ? eventNameToString(eventName) : eventName);
                 }
                 // do not create a new object as task.data to pass those things
                 // just use the global shared one
@@ -1736,7 +1867,7 @@ function patchEventTarget(_global, apis, patchOptions) {
                 taskData.capture = capture;
                 taskData.eventName = eventName;
                 taskData.isExisting = isExisting;
-                var data = useGlobalCallback ? OPTIMIZED_ZONE_EVENT_TASK_DATA : null;
+                var data = useGlobalCallback ? OPTIMIZED_ZONE_EVENT_TASK_DATA : undefined;
                 // keep taskData into data to allow onScheduleEventTask to access the task information
                 if (data) {
                     data.taskData = taskData;
@@ -1754,7 +1885,11 @@ function patchEventTarget(_global, apis, patchOptions) {
                 if (once) {
                     options.once = true;
                 }
-                task.options = options;
+                if (!(!passiveSupported && typeof task.options === 'boolean')) {
+                    // if not support passive, and we pass an option object
+                    // to addEventListener, we should save the options to task
+                    task.options = options;
+                }
                 task.target = target;
                 task.capture = capture;
                 task.eventName = eventName;
@@ -1839,7 +1974,7 @@ function patchEventTarget(_global, apis, patchOptions) {
             var target = this || _global;
             var eventName = arguments[0];
             var listeners = [];
-            var tasks = findEventTasks(target, eventName);
+            var tasks = findEventTasks(target, eventNameToString ? eventNameToString(eventName) : eventName);
             for (var i = 0; i < tasks.length; i++) {
                 var task = tasks[i];
                 var delegate = task.originalDelegate ? task.originalDelegate : task.callback;
@@ -1949,6 +2084,15 @@ Zone.__load_patch('EventEmitter', function (global) {
         // same callback, same capture, same event name, just return
         return task.callback === delegate || task.callback.listener === delegate;
     };
+    var eventNameToString = function (eventName) {
+        if (typeof eventName === 'string') {
+            return eventName;
+        }
+        if (!eventName) {
+            return '';
+        }
+        return eventName.toString().replace('(', '_').replace(')', '_');
+    };
     function patchEventEmitterMethods(obj) {
         var result = patchEventTarget(global, [obj], {
             useG: false,
@@ -1959,7 +2103,8 @@ Zone.__load_patch('EventEmitter', function (global) {
             listeners: EE_LISTENERS,
             chkDup: false,
             rt: true,
-            diff: compareTaskCallbackVsDelegate
+            diff: compareTaskCallbackVsDelegate,
+            eventNameToString: eventNameToString
         });
         if (result && result[0]) {
             obj[EE_ON] = obj[EE_ADD_LISTENER];
@@ -2068,9 +2213,9 @@ function patchTimer(window, setName, cancelName, nameSuffix) {
         patchMethod(window, setName, function (delegate) { return function (self, args) {
             if (typeof args[0] === 'function') {
                 var options = {
-                    handleId: null,
                     isPeriodic: nameSuffix === 'Interval',
-                    delay: (nameSuffix === 'Timeout' || nameSuffix === 'Interval') ? args[1] || 0 : null,
+                    delay: (nameSuffix === 'Timeout' || nameSuffix === 'Interval') ? args[1] || 0 :
+                        undefined,
                     args: args
                 };
                 var task = scheduleMacroTaskWithCurrentZone(setName, args[0], options, scheduleTask, clearTask);
@@ -2151,11 +2296,6 @@ function patchTimer(window, setName, cancelName, nameSuffix) {
  */
 var set = 'set';
 var clear = 'clear';
-Zone.__load_patch('node_util', function (global, Zone, api) {
-    api.patchOnProperties = patchOnProperties;
-    api.patchMethod = patchMethod;
-    api.bindArguments = bindArguments;
-});
 Zone.__load_patch('node_timers', function (global, Zone) {
     // Timers
     var globalUseTimeoutFromTimer = false;
@@ -2467,6 +2607,7 @@ var ProxyZoneSpec = /** @class */ (function () {
         if (defaultSpecDelegate === void 0) { defaultSpecDelegate = null; }
         this.defaultSpecDelegate = defaultSpecDelegate;
         this.name = 'ProxyZone';
+        this._delegateSpec = null;
         this.properties = { 'ProxyZoneSpec': this };
         this.propertyKeys = null;
         this.lastTaskState = null;
@@ -3269,7 +3410,11 @@ var __spread = (undefined && undefined.__spread) || function () {
                     }
                 }
             }
+            lastCurrentTime = this._currentTime;
             this._currentTime = finalTime;
+            if (doTick) {
+                doTick(this._currentTime - lastCurrentTime);
+            }
         };
         Scheduler.prototype.flush = function (limit, flushPeriodic, doTick) {
             if (limit === void 0) { limit = 20; }
@@ -3358,14 +3503,14 @@ var __spread = (undefined && undefined.__spread) || function () {
                     args[_i] = arguments[_i];
                 }
                 fn.apply(global, args);
-                if (_this._lastError === null) {
+                if (_this._lastError === null) { // Success
                     if (completers.onSuccess != null) {
                         completers.onSuccess.apply(global);
                     }
                     // Flush microtasks only on success.
                     _this.flushMicrotasks();
                 }
-                else {
+                else { // Failure
                     if (completers.onError != null) {
                         completers.onError.apply(global);
                     }
@@ -3664,23 +3809,23 @@ Zone.__load_patch('fakeasync', function (global, Zone, api) {
         ProxyZoneSpec && ProxyZoneSpec.assertPresent().resetDelegate();
     }
     /**
-    * Wraps a function to be executed in the fakeAsync zone:
-    * - microtasks are manually executed by calling `flushMicrotasks()`,
-    * - timers are synchronous, `tick()` simulates the asynchronous passage of time.
-    *
-    * If there are any pending timers at the end of the function, an exception will be thrown.
-    *
-    * Can be used to wrap inject() calls.
-    *
-    * ## Example
-    *
-    * {@example core/testing/ts/fake_async.ts region='basic'}
-    *
-    * @param fn
-    * @returns The function wrapped to be executed in the fakeAsync zone
-    *
-    * @experimental
-    */
+     * Wraps a function to be executed in the fakeAsync zone:
+     * - microtasks are manually executed by calling `flushMicrotasks()`,
+     * - timers are synchronous, `tick()` simulates the asynchronous passage of time.
+     *
+     * If there are any pending timers at the end of the function, an exception will be thrown.
+     *
+     * Can be used to wrap inject() calls.
+     *
+     * ## Example
+     *
+     * {@example core/testing/ts/fake_async.ts region='basic'}
+     *
+     * @param fn
+     * @returns The function wrapped to be executed in the fakeAsync zone
+     *
+     * @experimental
+     */
     function fakeAsync(fn) {
         // Not using an arrow function to preserve context passed from call site
         return function () {
diff --git a/dist/zone-testing.js b/dist/zone-testing.js
index aa2bbb2f2..735a76d7c 100644
--- a/dist/zone-testing.js
+++ b/dist/zone-testing.js
@@ -183,6 +183,7 @@ var ProxyZoneSpec = /** @class */ (function () {
         if (defaultSpecDelegate === void 0) { defaultSpecDelegate = null; }
         this.defaultSpecDelegate = defaultSpecDelegate;
         this.name = 'ProxyZone';
+        this._delegateSpec = null;
         this.properties = { 'ProxyZoneSpec': this };
         this.propertyKeys = null;
         this.lastTaskState = null;
@@ -985,7 +986,11 @@ var __spread = (undefined && undefined.__spread) || function () {
                     }
                 }
             }
+            lastCurrentTime = this._currentTime;
             this._currentTime = finalTime;
+            if (doTick) {
+                doTick(this._currentTime - lastCurrentTime);
+            }
         };
         Scheduler.prototype.flush = function (limit, flushPeriodic, doTick) {
             if (limit === void 0) { limit = 20; }
@@ -1074,14 +1079,14 @@ var __spread = (undefined && undefined.__spread) || function () {
                     args[_i] = arguments[_i];
                 }
                 fn.apply(global, args);
-                if (_this._lastError === null) {
+                if (_this._lastError === null) { // Success
                     if (completers.onSuccess != null) {
                         completers.onSuccess.apply(global);
                     }
                     // Flush microtasks only on success.
                     _this.flushMicrotasks();
                 }
-                else {
+                else { // Failure
                     if (completers.onError != null) {
                         completers.onError.apply(global);
                     }
@@ -1380,23 +1385,23 @@ Zone.__load_patch('fakeasync', function (global, Zone, api) {
         ProxyZoneSpec && ProxyZoneSpec.assertPresent().resetDelegate();
     }
     /**
-    * Wraps a function to be executed in the fakeAsync zone:
-    * - microtasks are manually executed by calling `flushMicrotasks()`,
-    * - timers are synchronous, `tick()` simulates the asynchronous passage of time.
-    *
-    * If there are any pending timers at the end of the function, an exception will be thrown.
-    *
-    * Can be used to wrap inject() calls.
-    *
-    * ## Example
-    *
-    * {@example core/testing/ts/fake_async.ts region='basic'}
-    *
-    * @param fn
-    * @returns The function wrapped to be executed in the fakeAsync zone
-    *
-    * @experimental
-    */
+     * Wraps a function to be executed in the fakeAsync zone:
+     * - microtasks are manually executed by calling `flushMicrotasks()`,
+     * - timers are synchronous, `tick()` simulates the asynchronous passage of time.
+     *
+     * If there are any pending timers at the end of the function, an exception will be thrown.
+     *
+     * Can be used to wrap inject() calls.
+     *
+     * ## Example
+     *
+     * {@example core/testing/ts/fake_async.ts region='basic'}
+     *
+     * @param fn
+     * @returns The function wrapped to be executed in the fakeAsync zone
+     *
+     * @experimental
+     */
     function fakeAsync(fn) {
         // Not using an arrow function to preserve context passed from call site
         return function () {
diff --git a/dist/zone.js b/dist/zone.js
index e15c127cf..fb3f4649b 100644
--- a/dist/zone.js
+++ b/dist/zone.js
@@ -19,7 +19,6 @@
  * found in the LICENSE file at https://angular.io/license
  */
 var Zone$1 = (function (global) {
-    var FUNCTION = 'function';
     var performance = global['performance'];
     function mark(name) {
         performance && performance['mark'] && performance['mark'](name);
@@ -28,12 +27,26 @@ var Zone$1 = (function (global) {
         performance && performance['measure'] && performance['measure'](name, label);
     }
     mark('Zone');
+    var checkDuplicate = global[('__zone_symbol__forceDuplicateZoneCheck')] === true;
     if (global['Zone']) {
-        throw new Error('Zone already loaded.');
+        // if global['Zone'] already exists (maybe zone.js was already loaded or
+        // some other lib also registered a global object named Zone), we may need
+        // to throw an error, but sometimes user may not want this error.
+        // For example,
+        // we have two web pages, page1 includes zone.js, page2 doesn't.
+        // and the 1st time user load page1 and page2, everything work fine,
+        // but when user load page2 again, error occurs because global['Zone'] already exists.
+        // so we add a flag to let user choose whether to throw this error or not.
+        // By default, if existing Zone is from zone.js, we will not throw the error.
+        if (checkDuplicate || typeof global['Zone'].__symbol__ !== 'function') {
+            throw new Error('Zone already loaded.');
+        }
+        else {
+            return global['Zone'];
+        }
     }
     var Zone = /** @class */ (function () {
         function Zone(parent, zoneSpec) {
-            this._properties = null;
             this._parent = parent;
             this._name = zoneSpec ? zoneSpec.name || 'unnamed' : '<root>';
             this._properties = zoneSpec && zoneSpec.properties || {};
@@ -76,7 +89,9 @@ var Zone$1 = (function (global) {
         });
         Zone.__load_patch = function (name, fn) {
             if (patches.hasOwnProperty(name)) {
-                throw Error('Already loaded patch: ' + name);
+                if (checkDuplicate) {
+                    throw Error('Already loaded patch: ' + name);
+                }
             }
             else if (!global['__Zone_disable_' + name]) {
                 var perfName = 'Zone:' + name;
@@ -120,7 +135,7 @@ var Zone$1 = (function (global) {
             return this._zoneDelegate.fork(this, zoneSpec);
         };
         Zone.prototype.wrap = function (callback, source) {
-            if (typeof callback !== FUNCTION) {
+            if (typeof callback !== 'function') {
                 throw new Error('Expecting function got: ' + callback);
             }
             var _callback = this._zoneDelegate.intercept(this, callback, source);
@@ -130,9 +145,6 @@ var Zone$1 = (function (global) {
             };
         };
         Zone.prototype.run = function (callback, applyThis, applyArgs, source) {
-            if (applyThis === void 0) { applyThis = undefined; }
-            if (applyArgs === void 0) { applyArgs = null; }
-            if (source === void 0) { source = null; }
             _currentZoneFrame = { parent: _currentZoneFrame, zone: this };
             try {
                 return this._zoneDelegate.invoke(this, callback, applyThis, applyArgs, source);
@@ -143,8 +155,6 @@ var Zone$1 = (function (global) {
         };
         Zone.prototype.runGuarded = function (callback, applyThis, applyArgs, source) {
             if (applyThis === void 0) { applyThis = null; }
-            if (applyArgs === void 0) { applyArgs = null; }
-            if (source === void 0) { source = null; }
             _currentZoneFrame = { parent: _currentZoneFrame, zone: this };
             try {
                 try {
@@ -168,10 +178,7 @@ var Zone$1 = (function (global) {
             // https://github.com/angular/zone.js/issues/778, sometimes eventTask
             // will run in notScheduled(canceled) state, we should not try to
             // run such kind of task but just return
-            // we have to define an variable here, if not
-            // typescript compiler will complain below
-            var isNotScheduled = task.state === notScheduled;
-            if (isNotScheduled && task.type === eventTask) {
+            if (task.state === notScheduled && (task.type === eventTask || task.type === macroTask)) {
                 return;
             }
             var reEntryGuard = task.state != running;
@@ -182,7 +189,7 @@ var Zone$1 = (function (global) {
             _currentZoneFrame = { parent: _currentZoneFrame, zone: this };
             try {
                 if (task.type == macroTask && task.data && !task.data.isPeriodic) {
-                    task.cancelFn = null;
+                    task.cancelFn = undefined;
                 }
                 try {
                     return this._zoneDelegate.invokeTask(this, task, applyThis, applyArgs);
@@ -218,8 +225,7 @@ var Zone$1 = (function (global) {
                 var newZone = this;
                 while (newZone) {
                     if (newZone === task.zone) {
-                        throw Error("can not reschedule task to " + this
-                            .name + " which is descendants of the original zone " + task.zone.name);
+                        throw Error("can not reschedule task to " + this.name + " which is descendants of the original zone " + task.zone.name);
                     }
                     newZone = newZone.parent;
                 }
@@ -249,7 +255,7 @@ var Zone$1 = (function (global) {
             return task;
         };
         Zone.prototype.scheduleMicroTask = function (source, callback, data, customSchedule) {
-            return this.scheduleTask(new ZoneTask(microTask, source, callback, data, customSchedule, null));
+            return this.scheduleTask(new ZoneTask(microTask, source, callback, data, customSchedule, undefined));
         };
         Zone.prototype.scheduleMacroTask = function (source, callback, data, customSchedule, customCancel) {
             return this.scheduleTask(new ZoneTask(macroTask, source, callback, data, customSchedule, customCancel));
@@ -290,16 +296,14 @@ var Zone$1 = (function (global) {
     }());
     var DELEGATE_ZS = {
         name: '',
-        onHasTask: function (delegate, _, target, hasTaskState) {
-            return delegate.hasTask(target, hasTaskState);
-        },
+        onHasTask: function (delegate, _, target, hasTaskState) { return delegate.hasTask(target, hasTaskState); },
         onScheduleTask: function (delegate, _, target, task) {
             return delegate.scheduleTask(target, task);
         },
-        onInvokeTask: function (delegate, _, target, task, applyThis, applyArgs) { return delegate.invokeTask(target, task, applyThis, applyArgs); },
-        onCancelTask: function (delegate, _, target, task) {
-            return delegate.cancelTask(target, task);
-        }
+        onInvokeTask: function (delegate, _, target, task, applyThis, applyArgs) {
+            return delegate.invokeTask(target, task, applyThis, applyArgs);
+        },
+        onCancelTask: function (delegate, _, target, task) { return delegate.cancelTask(target, task); }
     };
     var ZoneDelegate = /** @class */ (function () {
         function ZoneDelegate(zone, parentDelegate, zoneSpec) {
@@ -327,8 +331,8 @@ var Zone$1 = (function (global) {
                 zoneSpec && (zoneSpec.onHandleError ? this.zone : parentDelegate.zone);
             this._scheduleTaskZS =
                 zoneSpec && (zoneSpec.onScheduleTask ? zoneSpec : parentDelegate._scheduleTaskZS);
-            this._scheduleTaskDlgt =
-                zoneSpec && (zoneSpec.onScheduleTask ? parentDelegate : parentDelegate._scheduleTaskDlgt);
+            this._scheduleTaskDlgt = zoneSpec &&
+                (zoneSpec.onScheduleTask ? parentDelegate : parentDelegate._scheduleTaskDlgt);
             this._scheduleTaskCurrZone =
                 zoneSpec && (zoneSpec.onScheduleTask ? this.zone : parentDelegate.zone);
             this._invokeTaskZS =
@@ -383,8 +387,7 @@ var Zone$1 = (function (global) {
                 callback;
         };
         ZoneDelegate.prototype.invoke = function (targetZone, callback, applyThis, applyArgs, source) {
-            return this._invokeZS ?
-                this._invokeZS.onInvoke(this._invokeDlgt, this._invokeCurrZone, targetZone, callback, applyThis, applyArgs, source) :
+            return this._invokeZS ? this._invokeZS.onInvoke(this._invokeDlgt, this._invokeCurrZone, targetZone, callback, applyThis, applyArgs, source) :
                 callback.apply(applyThis, applyArgs);
         };
         ZoneDelegate.prototype.handleError = function (targetZone, error) {
@@ -416,8 +419,7 @@ var Zone$1 = (function (global) {
             return returnTask;
         };
         ZoneDelegate.prototype.invokeTask = function (targetZone, task, applyThis, applyArgs) {
-            return this._invokeTaskZS ?
-                this._invokeTaskZS.onInvokeTask(this._invokeTaskDlgt, this._invokeTaskCurrZone, targetZone, task, applyThis, applyArgs) :
+            return this._invokeTaskZS ? this._invokeTaskZS.onInvokeTask(this._invokeTaskDlgt, this._invokeTaskCurrZone, targetZone, task, applyThis, applyArgs) :
                 task.callback.apply(applyThis, applyArgs);
         };
         ZoneDelegate.prototype.cancelTask = function (targetZone, task) {
@@ -437,7 +439,7 @@ var Zone$1 = (function (global) {
             // hasTask should not throw error so other ZoneDelegate
             // can still trigger hasTask callback
             try {
-                return this._hasTaskZS &&
+                this._hasTaskZS &&
                     this._hasTaskZS.onHasTask(this._hasTaskDlgt, this._hasTaskCurrZone, targetZone, isEmpty);
             }
             catch (err) {
@@ -527,14 +529,12 @@ var Zone$1 = (function (global) {
                 }
             }
             else {
-                throw new Error(this.type + " '" + this.source + "': can not transition to '" + toState + "', expecting state '" + fromState1 + "'" + (fromState2 ?
-                    ' or \'' + fromState2 + '\'' :
-                    '') + ", was '" + this._state + "'.");
+                throw new Error(this.type + " '" + this.source + "': can not transition to '" + toState + "', expecting state '" + fromState1 + "'" + (fromState2 ? ' or \'' + fromState2 + '\'' : '') + ", was '" + this._state + "'.");
             }
         };
         ZoneTask.prototype.toString = function () {
             if (this.data && typeof this.data.handleId !== 'undefined') {
-                return this.data.handleId;
+                return this.data.handleId.toString();
             }
             else {
                 return Object.prototype.toString.call(this);
@@ -575,7 +575,13 @@ var Zone$1 = (function (global) {
                 }
             }
             if (nativeMicroTaskQueuePromise) {
-                nativeMicroTaskQueuePromise[symbolThen](drainMicroTaskQueue);
+                var nativeThen = nativeMicroTaskQueuePromise[symbolThen];
+                if (!nativeThen) {
+                    // native Promise is not patchable, we need to use `then` directly
+                    // issue 1078
+                    nativeThen = nativeMicroTaskQueuePromise['then'];
+                }
+                nativeThen.call(nativeMicroTaskQueuePromise, drainMicroTaskQueue);
             }
             else {
                 global[symbolSetTimeout](drainMicroTaskQueue, 0);
@@ -622,12 +628,13 @@ var Zone$1 = (function (global) {
         patchEventTarget: function () { return []; },
         patchOnProperties: noop,
         patchMethod: function () { return noop; },
-        bindArguments: function () { return null; },
+        bindArguments: function () { return []; },
+        patchThen: function () { return noop; },
         setNativePromise: function (NativePromise) {
             // sometimes NativePromise.resolve static function
             // is not ready yet, (such as core-js/es6.promise)
             // so we need to check here.
-            if (NativePromise && typeof NativePromise.resolve === FUNCTION) {
+            if (NativePromise && typeof NativePromise.resolve === 'function') {
                 nativeMicroTaskQueuePromise = NativePromise.resolve(0);
             }
         },
@@ -643,6 +650,16 @@ var Zone$1 = (function (global) {
     return global['Zone'] = Zone;
 })(typeof window !== 'undefined' && window || typeof self !== 'undefined' && self || global);
 
+var __values = (undefined && undefined.__values) || function (o) {
+    var m = typeof Symbol === "function" && o[Symbol.iterator], i = 0;
+    if (m) return m.call(o);
+    return {
+        next: function () {
+            if (o && i >= o.length) o = void 0;
+            return { value: o && o[i++], done: !o };
+        }
+    };
+};
 Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
     var ObjectGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
     var ObjectDefineProperty = Object.defineProperty;
@@ -785,7 +802,7 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
                 var queue = promise[symbolValue];
                 promise[symbolValue] = value;
                 if (promise[symbolFinally] === symbolFinally) {
-                    // the promise is generated by Promise.prototype.finally          
+                    // the promise is generated by Promise.prototype.finally
                     if (state === RESOLVED) {
                         // the state is resolved, should ignore the value
                         // and use parent promise value
@@ -869,7 +886,9 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
                     chainPromise[symbolParentPromiseState] = promiseState;
                 }
                 // should not pass value to finally callback
-                var value = zone.run(delegate, undefined, isFinallyPromise && delegate !== forwardRejection && delegate !== forwardResolution ? [] : [parentPromiseValue]);
+                var value = zone.run(delegate, undefined, isFinallyPromise && delegate !== forwardRejection && delegate !== forwardResolution ?
+                    [] :
+                    [parentPromiseValue]);
                 resolvePromise(chainPromise, true, value);
             }
             catch (error) {
@@ -904,6 +923,7 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
             return resolvePromise(new this(null), REJECTED, error);
         };
         ZoneAwarePromise.race = function (values) {
+            var e_1, _a;
             var resolve;
             var reject;
             var promise = new this(function (res, rej) {
@@ -916,40 +936,70 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
             function onReject(error) {
                 promise && (promise = null || reject(error));
             }
-            for (var _i = 0, values_1 = values; _i < values_1.length; _i++) {
-                var value = values_1[_i];
-                if (!isThenable(value)) {
-                    value = this.resolve(value);
+            try {
+                for (var values_1 = __values(values), values_1_1 = values_1.next(); !values_1_1.done; values_1_1 = values_1.next()) {
+                    var value = values_1_1.value;
+                    if (!isThenable(value)) {
+                        value = this.resolve(value);
+                    }
+                    value.then(onResolve, onReject);
+                }
+            }
+            catch (e_1_1) { e_1 = { error: e_1_1 }; }
+            finally {
+                try {
+                    if (values_1_1 && !values_1_1.done && (_a = values_1.return)) _a.call(values_1);
                 }
-                value.then(onResolve, onReject);
+                finally { if (e_1) throw e_1.error; }
             }
             return promise;
         };
         ZoneAwarePromise.all = function (values) {
+            var e_2, _a;
             var resolve;
             var reject;
             var promise = new this(function (res, rej) {
                 resolve = res;
                 reject = rej;
             });
-            var count = 0;
+            // Start at 2 to prevent prematurely resolving if .then is called immediately.
+            var unresolvedCount = 2;
+            var valueIndex = 0;
             var resolvedValues = [];
-            for (var _i = 0, values_2 = values; _i < values_2.length; _i++) {
-                var value = values_2[_i];
+            var _loop_2 = function (value) {
                 if (!isThenable(value)) {
-                    value = this.resolve(value);
+                    value = this_1.resolve(value);
                 }
-                value.then((function (index) { return function (value) {
-                    resolvedValues[index] = value;
-                    count--;
-                    if (!count) {
+                var curValueIndex = valueIndex;
+                value.then(function (value) {
+                    resolvedValues[curValueIndex] = value;
+                    unresolvedCount--;
+                    if (unresolvedCount === 0) {
                         resolve(resolvedValues);
                     }
-                }; })(count), reject);
-                count++;
+                }, reject);
+                unresolvedCount++;
+                valueIndex++;
+            };
+            var this_1 = this;
+            try {
+                for (var values_2 = __values(values), values_2_1 = values_2.next(); !values_2_1.done; values_2_1 = values_2.next()) {
+                    var value = values_2_1.value;
+                    _loop_2(value);
+                }
             }
-            if (!count)
+            catch (e_2_1) { e_2 = { error: e_2_1 }; }
+            finally {
+                try {
+                    if (values_2_1 && !values_2_1.done && (_a = values_2.return)) _a.call(values_2);
+                }
+                finally { if (e_2) throw e_2.error; }
+            }
+            // Make the unresolvedCount zero-based again.
+            unresolvedCount -= 2;
+            if (unresolvedCount === 0) {
                 resolve(resolvedValues);
+            }
             return promise;
         };
         ZoneAwarePromise.prototype.then = function (onFulfilled, onRejected) {
@@ -1045,31 +1095,112 @@ Zone.__load_patch('ZoneAwarePromise', function (global, Zone, api) {
         };
         Ctor[symbolThenPatched] = true;
     }
-    function zoneify(fn) {
-        return function () {
-            var resultPromise = fn.apply(this, arguments);
-            if (resultPromise instanceof ZoneAwarePromise) {
-                return resultPromise;
-            }
-            var ctor = resultPromise.constructor;
-            if (!ctor[symbolThenPatched]) {
-                patchThen(ctor);
-            }
-            return resultPromise;
-        };
-    }
+    api.patchThen = patchThen;
     if (NativePromise) {
         patchThen(NativePromise);
-        var fetch_1 = global['fetch'];
-        if (typeof fetch_1 == 'function') {
-            global['fetch'] = zoneify(fetch_1);
-        }
     }
     // This is not part of public API, but it is useful for tests, so we expose it.
     Promise[Zone.__symbol__('uncaughtPromiseErrors')] = _uncaughtPromiseErrors;
     return ZoneAwarePromise;
 });
 
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+Zone.__load_patch('fetch', function (global, Zone, api) {
+    var fetch = global['fetch'];
+    var ZoneAwarePromise = global.Promise;
+    var symbolThenPatched = api.symbol('thenPatched');
+    var fetchTaskScheduling = api.symbol('fetchTaskScheduling');
+    var fetchTaskAborting = api.symbol('fetchTaskAborting');
+    if (typeof fetch !== 'function') {
+        return;
+    }
+    var OriginalAbortController = global['AbortController'];
+    var supportAbort = typeof OriginalAbortController === 'function';
+    var abortNative = null;
+    if (supportAbort) {
+        global['AbortController'] = function () {
+            var abortController = new OriginalAbortController();
+            var signal = abortController.signal;
+            signal.abortController = abortController;
+            return abortController;
+        };
+        abortNative = api.patchMethod(OriginalAbortController.prototype, 'abort', function (delegate) { return function (self, args) {
+            if (self.task) {
+                return self.task.zone.cancelTask(self.task);
+            }
+            return delegate.apply(self, args);
+        }; });
+    }
+    var placeholder = function () { };
+    global['fetch'] = function () {
+        var _this = this;
+        var args = Array.prototype.slice.call(arguments);
+        var options = args.length > 1 ? args[1] : null;
+        var signal = options && options.signal;
+        return new Promise(function (res, rej) {
+            var task = Zone.current.scheduleMacroTask('fetch', placeholder, args, function () {
+                var fetchPromise;
+                var zone = Zone.current;
+                try {
+                    zone[fetchTaskScheduling] = true;
+                    fetchPromise = fetch.apply(_this, args);
+                }
+                catch (error) {
+                    rej(error);
+                    return;
+                }
+                finally {
+                    zone[fetchTaskScheduling] = false;
+                }
+                if (!(fetchPromise instanceof ZoneAwarePromise)) {
+                    var ctor = fetchPromise.constructor;
+                    if (!ctor[symbolThenPatched]) {
+                        api.patchThen(ctor);
+                    }
+                }
+                fetchPromise.then(function (resource) {
+                    if (task.state !== 'notScheduled') {
+                        task.invoke();
+                    }
+                    res(resource);
+                }, function (error) {
+                    if (task.state !== 'notScheduled') {
+                        task.invoke();
+                    }
+                    rej(error);
+                });
+            }, function () {
+                if (!supportAbort) {
+                    rej('No AbortController supported, can not cancel fetch');
+                    return;
+                }
+                if (signal && signal.abortController && !signal.aborted &&
+                    typeof signal.abortController.abort === 'function' && abortNative) {
+                    try {
+                        Zone.current[fetchTaskAborting] = true;
+                        abortNative.call(signal.abortController);
+                    }
+                    finally {
+                        Zone.current[fetchTaskAborting] = false;
+                    }
+                }
+                else {
+                    rej('cancel fetch need a AbortController.signal');
+                }
+            });
+            if (signal && signal.abortController) {
+                signal.abortController.task = task;
+            }
+        });
+    };
+});
+
 /**
  * @license
  * Copyright Google Inc. All Rights Reserved.
@@ -1185,9 +1316,23 @@ var wrapFn = function (event) {
     }
     var target = this || event.target || _global;
     var listener = target[eventNameSymbol];
-    var result = listener && listener.apply(this, arguments);
-    if (result != undefined && !result) {
-        event.preventDefault();
+    var result;
+    if (isBrowser && target === internalWindow && event.type === 'error') {
+        // window.onerror have different signiture
+        // https://developer.mozilla.org/en-US/docs/Web/API/GlobalEventHandlers/onerror#window.onerror
+        // and onerror callback will prevent default when callback return true
+        var errorEvent = event;
+        result = listener &&
+            listener.call(this, errorEvent.message, errorEvent.filename, errorEvent.lineno, errorEvent.colno, errorEvent.error);
+        if (result === true) {
+            event.preventDefault();
+        }
+    }
+    else {
+        result = listener && listener.apply(this, arguments);
+        if (result != undefined && !result) {
+            event.preventDefault();
+        }
     }
     return result;
 };
@@ -1205,6 +1350,10 @@ function patchProperty(obj, prop, prototype) {
     if (!desc || !desc.configurable) {
         return;
     }
+    var onPropPatchedSymbol = zoneSymbol('on' + prop + 'patched');
+    if (obj.hasOwnProperty(onPropPatchedSymbol) && obj[onPropPatchedSymbol]) {
+        return;
+    }
     // A property descriptor cannot have getter/setter and be writable
     // deleting the writable and value properties avoids this error:
     //
@@ -1282,6 +1431,7 @@ function patchProperty(obj, prop, prototype) {
         return null;
     };
     ObjectDefineProperty(obj, prop, desc);
+    obj[onPropPatchedSymbol] = true;
 }
 function patchOnProperties(obj, properties, prototype) {
     if (properties) {
@@ -1372,6 +1522,31 @@ function patchClass(className) {
         }
     }
 }
+function copySymbolProperties(src, dest) {
+    if (typeof Object.getOwnPropertySymbols !== 'function') {
+        return;
+    }
+    var symbols = Object.getOwnPropertySymbols(src);
+    symbols.forEach(function (symbol) {
+        var desc = Object.getOwnPropertyDescriptor(src, symbol);
+        Object.defineProperty(dest, symbol, {
+            get: function () {
+                return src[symbol];
+            },
+            set: function (value) {
+                if (desc && (!desc.writable || typeof desc.set !== 'function')) {
+                    // if src[symbol] is not writable or not have a setter, just return
+                    return;
+                }
+                src[symbol] = value;
+            },
+            enumerable: desc ? desc.enumerable : true,
+            configurable: desc ? desc.configurable : true
+        });
+    });
+}
+var shouldCopySymbolProperties = false;
+
 function patchMethod(target, name, patchFn) {
     var proto = target;
     while (proto && !proto.hasOwnProperty(name)) {
@@ -1382,7 +1557,7 @@ function patchMethod(target, name, patchFn) {
         proto = target;
     }
     var delegateName = zoneSymbol(name);
-    var delegate;
+    var delegate = null;
     if (proto && !(delegate = proto[delegateName])) {
         delegate = proto[delegateName] = proto[name];
         // check whether proto[name] is writable
@@ -1394,6 +1569,9 @@ function patchMethod(target, name, patchFn) {
                 return patchDelegate_1(this, arguments);
             };
             attachOriginToPatched(proto[name], delegate);
+            if (shouldCopySymbolProperties) {
+                copySymbolProperties(delegate, proto[name]);
+            }
         }
     }
     return delegate;
@@ -1412,7 +1590,7 @@ function patchMacroTask(obj, funcName, metaCreator) {
     setNative = patchMethod(obj, funcName, function (delegate) { return function (self, args) {
         var meta = metaCreator(self, args);
         if (meta.cbIdx >= 0 && typeof args[meta.cbIdx] === 'function') {
-            return scheduleMacroTaskWithCurrentZone(meta.name, args[meta.cbIdx], meta, scheduleTask, null);
+            return scheduleMacroTaskWithCurrentZone(meta.name, args[meta.cbIdx], meta, scheduleTask);
         }
         else {
             // cause an error by calling it directly.
@@ -1426,6 +1604,17 @@ function attachOriginToPatched(patched, original) {
 }
 var isDetectedIEOrEdge = false;
 var ieOrEdge = false;
+function isIE() {
+    try {
+        var ua = internalWindow.navigator.userAgent;
+        if (ua.indexOf('MSIE ') !== -1 || ua.indexOf('Trident/') !== -1) {
+            return true;
+        }
+    }
+    catch (error) {
+    }
+    return false;
+}
 function isIEOrEdge() {
     if (isDetectedIEOrEdge) {
         return ieOrEdge;
@@ -1507,6 +1696,21 @@ Zone.__load_patch('toString', function (global) {
  * @fileoverview
  * @suppress {missingRequire}
  */
+var passiveSupported = false;
+if (typeof window !== 'undefined') {
+    try {
+        var options = Object.defineProperty({}, 'passive', {
+            get: function () {
+                passiveSupported = true;
+            }
+        });
+        window.addEventListener('test', options, options);
+        window.removeEventListener('test', options, options);
+    }
+    catch (err) {
+        passiveSupported = false;
+    }
+}
 // an identifier to tell ZoneTask do not create a new invoke closure
 var OPTIMIZED_ZONE_EVENT_TASK_DATA = {
     useG: true
@@ -1642,6 +1846,7 @@ function patchEventTarget(_global, apis, patchOptions) {
         if (proto[zoneSymbolAddEventListener]) {
             return false;
         }
+        var eventNameToString = patchOptions && patchOptions.eventNameToString;
         // a shared global taskData to pass data for scheduleEventTask
         // so we do not need to create a new object just for pass some data
         var taskData = {};
@@ -1657,12 +1862,24 @@ function patchEventTarget(_global, apis, patchOptions) {
             nativePrependEventListener = proto[zoneSymbol(patchOptions.prepend)] =
                 proto[patchOptions.prepend];
         }
-        var customScheduleGlobal = function () {
+        function checkIsPassive(task) {
+            if (!passiveSupported && typeof taskData.options !== 'boolean' &&
+                typeof taskData.options !== 'undefined' && taskData.options !== null) {
+                // options is a non-null non-undefined object
+                // passive is not supported
+                // don't pass options as object
+                // just pass capture as a boolean
+                task.options = !!taskData.options.capture;
+                taskData.options = task.options;
+            }
+        }
+        var customScheduleGlobal = function (task) {
             // if there is already a task for the eventName + capture,
             // just return, because we use the shared globalZoneAwareCallback here.
             if (taskData.isExisting) {
                 return;
             }
+            checkIsPassive(task);
             return nativeAddEventListener.call(taskData.target, taskData.eventName, taskData.capture ? globalZoneAwareCaptureCallback : globalZoneAwareCallback, taskData.options);
         };
         var customCancelGlobal = function (task) {
@@ -1703,6 +1920,7 @@ function patchEventTarget(_global, apis, patchOptions) {
             return nativeRemoveEventListener.call(task.target, task.eventName, task.capture ? globalZoneAwareCaptureCallback : globalZoneAwareCallback, task.options);
         };
         var customScheduleNonGlobal = function (task) {
+            checkIsPassive(task);
             return nativeAddEventListener.call(taskData.target, taskData.eventName, task.invoke, taskData.options);
         };
         var customSchedulePrepend = function (task) {
@@ -1725,10 +1943,15 @@ function patchEventTarget(_global, apis, patchOptions) {
             if (prepend === void 0) { prepend = false; }
             return function () {
                 var target = this || _global;
+                var eventName = arguments[0];
                 var delegate = arguments[1];
                 if (!delegate) {
                     return nativeListener.apply(this, arguments);
                 }
+                if (isNode && eventName === 'uncaughtException') {
+                    // don't patch uncaughtException of nodejs to prevent endless loop
+                    return nativeListener.apply(this, arguments);
+                }
                 // don't create the bind delegate function for handleEvent
                 // case here to improve addEventListener performance
                 // we will create the bind delegate when invoke
@@ -1742,7 +1965,6 @@ function patchEventTarget(_global, apis, patchOptions) {
                 if (validateHandler && !validateHandler(nativeListener, delegate, target, arguments)) {
                     return;
                 }
-                var eventName = arguments[0];
                 var options = arguments[2];
                 if (blackListedEvents) {
                     // check black list
@@ -1772,8 +1994,8 @@ function patchEventTarget(_global, apis, patchOptions) {
                 var symbolEventName;
                 if (!symbolEventNames) {
                     // the code is duplicate, but I just want to get some better performance
-                    var falseEventName = eventName + FALSE_STR;
-                    var trueEventName = eventName + TRUE_STR;
+                    var falseEventName = (eventNameToString ? eventNameToString(eventName) : eventName) + FALSE_STR;
+                    var trueEventName = (eventNameToString ? eventNameToString(eventName) : eventName) + TRUE_STR;
                     var symbol = ZONE_SYMBOL_PREFIX + falseEventName;
                     var symbolCapture = ZONE_SYMBOL_PREFIX + trueEventName;
                     zoneSymbolEventNames$1[eventName] = {};
@@ -1808,7 +2030,8 @@ function patchEventTarget(_global, apis, patchOptions) {
                     source = targetSource[eventName];
                 }
                 if (!source) {
-                    source = constructorName + addSource + eventName;
+                    source = constructorName + addSource +
+                        (eventNameToString ? eventNameToString(eventName) : eventName);
                 }
                 // do not create a new object as task.data to pass those things
                 // just use the global shared one
@@ -1823,7 +2046,7 @@ function patchEventTarget(_global, apis, patchOptions) {
                 taskData.capture = capture;
                 taskData.eventName = eventName;
                 taskData.isExisting = isExisting;
-                var data = useGlobalCallback ? OPTIMIZED_ZONE_EVENT_TASK_DATA : null;
+                var data = useGlobalCallback ? OPTIMIZED_ZONE_EVENT_TASK_DATA : undefined;
                 // keep taskData into data to allow onScheduleEventTask to access the task information
                 if (data) {
                     data.taskData = taskData;
@@ -1841,7 +2064,11 @@ function patchEventTarget(_global, apis, patchOptions) {
                 if (once) {
                     options.once = true;
                 }
-                task.options = options;
+                if (!(!passiveSupported && typeof task.options === 'boolean')) {
+                    // if not support passive, and we pass an option object
+                    // to addEventListener, we should save the options to task
+                    task.options = options;
+                }
                 task.target = target;
                 task.capture = capture;
                 task.eventName = eventName;
@@ -1926,7 +2153,7 @@ function patchEventTarget(_global, apis, patchOptions) {
             var target = this || _global;
             var eventName = arguments[0];
             var listeners = [];
-            var tasks = findEventTasks(target, eventName);
+            var tasks = findEventTasks(target, eventNameToString ? eventNameToString(eventName) : eventName);
             for (var i = 0; i < tasks.length; i++) {
                 var task = tasks[i];
                 var delegate = task.originalDelegate ? task.originalDelegate : task.callback;
@@ -2082,9 +2309,9 @@ function patchTimer(window, setName, cancelName, nameSuffix) {
         patchMethod(window, setName, function (delegate) { return function (self, args) {
             if (typeof args[0] === 'function') {
                 var options = {
-                    handleId: null,
                     isPeriodic: nameSuffix === 'Interval',
-                    delay: (nameSuffix === 'Timeout' || nameSuffix === 'Interval') ? args[1] || 0 : null,
+                    delay: (nameSuffix === 'Timeout' || nameSuffix === 'Interval') ? args[1] || 0 :
+                        undefined,
                     args: args
                 };
                 var task = scheduleMacroTaskWithCurrentZone(setName, args[0], options, scheduleTask, clearTask);
@@ -2199,7 +2426,7 @@ function propertyPatch() {
     };
     Object.getOwnPropertyDescriptor = function (obj, prop) {
         var desc = _getOwnPropertyDescriptor(obj, prop);
-        if (isUnconfigurable(obj, prop)) {
+        if (desc && isUnconfigurable(obj, prop)) {
             desc.configurable = false;
         }
         return desc;
@@ -2427,10 +2654,10 @@ var globalEventHandlersEventNames = [
     'wheel'
 ];
 var documentEventNames = [
-    'afterscriptexecute', 'beforescriptexecute', 'DOMContentLoaded', 'fullscreenchange',
+    'afterscriptexecute', 'beforescriptexecute', 'DOMContentLoaded', 'freeze', 'fullscreenchange',
     'mozfullscreenchange', 'webkitfullscreenchange', 'msfullscreenchange', 'fullscreenerror',
     'mozfullscreenerror', 'webkitfullscreenerror', 'msfullscreenerror', 'readystatechange',
-    'visibilitychange'
+    'visibilitychange', 'resume'
 ];
 var windowEventNames = [
     'absolutedeviceorientation',
@@ -2542,7 +2769,7 @@ var websocketEventNames = ['close', 'error', 'open', 'message'];
 var workerEventNames = ['error', 'message'];
 var eventNames = globalEventHandlersEventNames.concat(webglEventNames, formEventNames, detailEventNames, documentEventNames, windowEventNames, htmlElementEventNames, ieElementEventNames);
 function filterProperties(target, onProperties, ignoreProperties) {
-    if (!ignoreProperties) {
+    if (!ignoreProperties || ignoreProperties.length === 0) {
         return onProperties;
     }
     var tip = ignoreProperties.filter(function (ip) { return ip.target === target; });
@@ -2567,13 +2794,14 @@ function propertyDescriptorPatch(api, _global) {
     }
     var supportsWebSocket = typeof WebSocket !== 'undefined';
     if (canPatchViaPropertyDescriptor()) {
-        var ignoreProperties = _global.__Zone_ignore_on_properties;
+        var ignoreProperties = _global['__Zone_ignore_on_properties'];
         // for browsers that we can patch the descriptor:  Chrome & Firefox
         if (isBrowser) {
             var internalWindow = window;
+            var ignoreErrorProperties = isIE ? [{ target: internalWindow, ignoreProperties: ['error'] }] : [];
             // in IE/Edge, onProp not exist in window object, but in WindowPrototype
             // so we need to pass WindowPrototype to check onProp exist or not
-            patchFilteredProperties(internalWindow, eventNames.concat(['messageerror']), ignoreProperties, ObjectGetPrototypeOf(internalWindow));
+            patchFilteredProperties(internalWindow, eventNames.concat(['messageerror']), ignoreProperties ? ignoreProperties.concat(ignoreErrorProperties) : ignoreProperties, ObjectGetPrototypeOf(internalWindow));
             patchFilteredProperties(Document.prototype, eventNames, ignoreProperties);
             if (typeof internalWindow['SVGElement'] !== 'undefined') {
                 patchFilteredProperties(internalWindow['SVGElement'].prototype, eventNames, ignoreProperties);
@@ -2595,9 +2823,9 @@ function propertyDescriptorPatch(api, _global) {
             }
         }
         patchFilteredProperties(XMLHttpRequest.prototype, XMLHttpRequestEventNames, ignoreProperties);
-        var XMLHttpRequestEventTarget = _global['XMLHttpRequestEventTarget'];
-        if (XMLHttpRequestEventTarget) {
-            patchFilteredProperties(XMLHttpRequestEventTarget && XMLHttpRequestEventTarget.prototype, XMLHttpRequestEventNames, ignoreProperties);
+        var XMLHttpRequestEventTarget_1 = _global['XMLHttpRequestEventTarget'];
+        if (XMLHttpRequestEventTarget_1) {
+            patchFilteredProperties(XMLHttpRequestEventTarget_1 && XMLHttpRequestEventTarget_1.prototype, XMLHttpRequestEventNames, ignoreProperties);
         }
         if (typeof IDBIndex !== 'undefined') {
             patchFilteredProperties(IDBIndex.prototype, IDBIndexEventNames, ignoreProperties);
@@ -2812,16 +3040,16 @@ function patchEvent(global, api) {
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.io/license
  */
-function registerElementPatch(_global) {
-    if ((!isBrowser && !isMix) || !('registerElement' in _global.document)) {
+function patchCallbacks(target, targetName, method, callbacks) {
+    var symbol = Zone.__symbol__(method);
+    if (target[symbol]) {
         return;
     }
-    var _registerElement = document.registerElement;
-    var callbacks = ['createdCallback', 'attachedCallback', 'detachedCallback', 'attributeChangedCallback'];
-    document.registerElement = function (name, opts) {
+    var nativeDelegate = target[symbol] = target[method];
+    target[method] = function (name, opts, options) {
         if (opts && opts.prototype) {
             callbacks.forEach(function (callback) {
-                var source = 'Document.registerElement::' + callback;
+                var source = targetName + "." + method + "::" + callback;
                 var prototype = opts.prototype;
                 if (prototype.hasOwnProperty(callback)) {
                     var descriptor = ObjectGetOwnPropertyDescriptor(prototype, callback);
@@ -2838,9 +3066,23 @@ function registerElementPatch(_global) {
                 }
             });
         }
-        return _registerElement.call(document, name, opts);
+        return nativeDelegate.call(target, name, opts, options);
     };
-    attachOriginToPatched(document.registerElement, _registerElement);
+    attachOriginToPatched(target[method], nativeDelegate);
+}
+function registerElementPatch(_global) {
+    if ((!isBrowser && !isMix) || !('registerElement' in _global.document)) {
+        return;
+    }
+    var callbacks = ['createdCallback', 'attachedCallback', 'detachedCallback', 'attributeChangedCallback'];
+    patchCallbacks(document, 'Document', 'registerElement', callbacks);
+}
+function patchCustomElements(_global) {
+    if ((!isBrowser && !isMix) || !('customElements' in _global)) {
+        return;
+    }
+    var callbacks = ['connectedCallback', 'disconnectedCallback', 'adoptedCallback', 'attributeChangedCallback'];
+    patchCallbacks(_global.customElements, 'customElements', 'define', callbacks);
 }
 
 /**
@@ -2903,7 +3145,10 @@ Zone.__load_patch('EventTarget', function (global, Zone, api) {
 Zone.__load_patch('on_property', function (global, Zone, api) {
     propertyDescriptorPatch(api, global);
     propertyPatch();
+});
+Zone.__load_patch('customElements', function (global, Zone, api) {
     registerElementPatch(global);
+    patchCustomElements(global);
 });
 Zone.__load_patch('canvas', function (global) {
     var HTMLCanvasElement = global['HTMLCanvasElement'];
@@ -2922,6 +3167,7 @@ Zone.__load_patch('XHR', function (global, Zone) {
     var XHR_LISTENER = zoneSymbol('xhrListener');
     var XHR_SCHEDULED = zoneSymbol('xhrScheduled');
     var XHR_URL = zoneSymbol('xhrURL');
+    var XHR_ERROR_BEFORE_SCHEDULED = zoneSymbol('xhrErrorBeforeScheduled');
     function patchXHR(window) {
         var XMLHttpRequestPrototype = XMLHttpRequest.prototype;
         function findPendingTask(target) {
@@ -2930,9 +3176,9 @@ Zone.__load_patch('XHR', function (global, Zone) {
         var oriAddListener = XMLHttpRequestPrototype[ZONE_SYMBOL_ADD_EVENT_LISTENER];
         var oriRemoveListener = XMLHttpRequestPrototype[ZONE_SYMBOL_REMOVE_EVENT_LISTENER];
         if (!oriAddListener) {
-            var XMLHttpRequestEventTarget = window['XMLHttpRequestEventTarget'];
-            if (XMLHttpRequestEventTarget) {
-                var XMLHttpRequestEventTargetPrototype = XMLHttpRequestEventTarget.prototype;
+            var XMLHttpRequestEventTarget_1 = window['XMLHttpRequestEventTarget'];
+            if (XMLHttpRequestEventTarget_1) {
+                var XMLHttpRequestEventTargetPrototype = XMLHttpRequestEventTarget_1.prototype;
                 oriAddListener = XMLHttpRequestEventTargetPrototype[ZONE_SYMBOL_ADD_EVENT_LISTENER];
                 oriRemoveListener = XMLHttpRequestEventTargetPrototype[ZONE_SYMBOL_REMOVE_EVENT_LISTENER];
             }
@@ -2940,9 +3186,10 @@ Zone.__load_patch('XHR', function (global, Zone) {
         var READY_STATE_CHANGE = 'readystatechange';
         var SCHEDULED = 'scheduled';
         function scheduleTask(task) {
-            XMLHttpRequest[XHR_SCHEDULED] = false;
             var data = task.data;
             var target = data.target;
+            target[XHR_SCHEDULED] = false;
+            target[XHR_ERROR_BEFORE_SCHEDULED] = false;
             // remove existing event listener
             var listener = target[XHR_LISTENER];
             if (!oriAddListener) {
@@ -2956,8 +3203,35 @@ Zone.__load_patch('XHR', function (global, Zone) {
                 if (target.readyState === target.DONE) {
                     // sometimes on some browsers XMLHttpRequest will fire onreadystatechange with
                     // readyState=4 multiple times, so we need to check task state here
-                    if (!data.aborted && XMLHttpRequest[XHR_SCHEDULED] && task.state === SCHEDULED) {
-                        task.invoke();
+                    if (!data.aborted && target[XHR_SCHEDULED] && task.state === SCHEDULED) {
+                        // check whether the xhr has registered onload listener
+                        // if that is the case, the task should invoke after all
+                        // onload listeners finish.
+                        var loadTasks = target['__zone_symbol__loadfalse'];
+                        if (loadTasks && loadTasks.length > 0) {
+                            var oriInvoke_1 = task.invoke;
+                            task.invoke = function () {
+                                // need to load the tasks again, because in other
+                                // load listener, they may remove themselves
+                                var loadTasks = target['__zone_symbol__loadfalse'];
+                                for (var i = 0; i < loadTasks.length; i++) {
+                                    if (loadTasks[i] === task) {
+                                        loadTasks.splice(i, 1);
+                                    }
+                                }
+                                if (!data.aborted && task.state === SCHEDULED) {
+                                    oriInvoke_1.call(task);
+                                }
+                            };
+                            loadTasks.push(task);
+                        }
+                        else {
+                            task.invoke();
+                        }
+                    }
+                    else if (!data.aborted && target[XHR_SCHEDULED] === false) {
+                        // error occurs when xhr.send()
+                        target[XHR_ERROR_BEFORE_SCHEDULED] = true;
                     }
                 }
             };
@@ -2967,7 +3241,7 @@ Zone.__load_patch('XHR', function (global, Zone) {
                 target[XHR_TASK] = task;
             }
             sendNative.apply(target, data.args);
-            XMLHttpRequest[XHR_SCHEDULED] = true;
+            target[XHR_SCHEDULED] = true;
             return task;
         }
         function placeholderCallback() { }
@@ -2984,24 +3258,32 @@ Zone.__load_patch('XHR', function (global, Zone) {
             return openNative.apply(self, args);
         }; });
         var XMLHTTPREQUEST_SOURCE = 'XMLHttpRequest.send';
+        var fetchTaskAborting = zoneSymbol('fetchTaskAborting');
+        var fetchTaskScheduling = zoneSymbol('fetchTaskScheduling');
         var sendNative = patchMethod(XMLHttpRequestPrototype, 'send', function () { return function (self, args) {
+            if (Zone.current[fetchTaskScheduling] === true) {
+                // a fetch is scheduling, so we are using xhr to polyfill fetch
+                // and because we already schedule macroTask for fetch, we should
+                // not schedule a macroTask for xhr again
+                return sendNative.apply(self, args);
+            }
             if (self[XHR_SYNC]) {
                 // if the XHR is sync there is no task to schedule, just execute the code.
                 return sendNative.apply(self, args);
             }
             else {
-                var options = {
-                    target: self,
-                    url: self[XHR_URL],
-                    isPeriodic: false,
-                    delay: null,
-                    args: args,
-                    aborted: false
-                };
-                return scheduleMacroTaskWithCurrentZone(XMLHTTPREQUEST_SOURCE, placeholderCallback, options, scheduleTask, clearTask);
+                var options = { target: self, url: self[XHR_URL], isPeriodic: false, args: args, aborted: false };
+                var task = scheduleMacroTaskWithCurrentZone(XMLHTTPREQUEST_SOURCE, placeholderCallback, options, scheduleTask, clearTask);
+                if (self && self[XHR_ERROR_BEFORE_SCHEDULED] === true && !options.aborted &&
+                    task.state === SCHEDULED) {
+                    // xhr request throw error when send
+                    // we should invoke task instead of leaving a scheduled
+                    // pending macroTask
+                    task.invoke();
+                }
             }
         }; });
-        var abortNative = patchMethod(XMLHttpRequestPrototype, 'abort', function () { return function (self) {
+        var abortNative = patchMethod(XMLHttpRequestPrototype, 'abort', function () { return function (self, args) {
             var task = findPendingTask(self);
             if (task && typeof task.type == 'string') {
                 // If the XHR has already completed, do nothing.
@@ -3013,6 +3295,10 @@ Zone.__load_patch('XHR', function (global, Zone) {
                 }
                 task.zone.cancelTask(task);
             }
+            else if (Zone.current[fetchTaskAborting] === true) {
+                // the abort is called from fetch polyfill, we need to call native abort of XHR.
+                return abortNative.apply(self, args);
+            }
             // Otherwise, we are trying to abort an XHR which has not yet been sent, so there is no
             // task
             // to cancel. Do nothing.
diff --git a/dist/zone.js.d.ts b/dist/zone.js.d.ts
index ac7ddcdb4..5420fe1ba 100644
--- a/dist/zone.js.d.ts
+++ b/dist/zone.js.d.ts
@@ -136,7 +136,7 @@ interface Zone {
      *
      * @returns {Zone} The parent Zone.
      */
-    parent: Zone;
+    parent: Zone | null;
     /**
      * @returns {string} The Zone name (useful for debugging)
      */
@@ -159,7 +159,7 @@ interface Zone {
      * @param key The key to use for identification of the returned zone.
      * @returns {Zone} The Zone which defines the `key`, `null` if not found.
      */
-    getZoneWith(key: string): Zone;
+    getZoneWith(key: string): Zone | null;
     /**
      * Used to create a child zone.
      *
@@ -235,7 +235,7 @@ interface Zone {
      * @param customSchedule
      * @param customCancel
      */
-    scheduleMacroTask(source: string, callback: Function, data: TaskData, customSchedule: (task: Task) => void, customCancel: (task: Task) => void): MacroTask;
+    scheduleMacroTask(source: string, callback: Function, data?: TaskData, customSchedule?: (task: Task) => void, customCancel?: (task: Task) => void): MacroTask;
     /**
      * Schedule an EventTask.
      *
@@ -245,7 +245,7 @@ interface Zone {
      * @param customSchedule
      * @param customCancel
      */
-    scheduleEventTask(source: string, callback: Function, data: TaskData, customSchedule: (task: Task) => void, customCancel: (task: Task) => void): EventTask;
+    scheduleEventTask(source: string, callback: Function, data?: TaskData, customSchedule?: (task: Task) => void, customCancel?: (task: Task) => void): EventTask;
     /**
      * Schedule an existing Task.
      *
@@ -275,7 +275,7 @@ interface ZoneType {
     /**
      * @returns {Task} The task associated with the current execution.
      */
-    currentTask: Task;
+    currentTask: Task | null;
     /**
      * Verify that Zone has been correctly patched. Specifically that Promise is zone aware.
      */
@@ -339,7 +339,7 @@ interface ZoneSpec {
      * @param applyArgs The argument passed into the `run` method.
      * @param source The argument passed into the `run` method.
      */
-    onInvoke?: (parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, delegate: Function, applyThis: any, applyArgs: any[], source: string) => any;
+    onInvoke?: (parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, delegate: Function, applyThis: any, applyArgs?: any[], source?: string) => any;
     /**
      * Allows interception of the error handling.
      *
@@ -358,7 +358,7 @@ interface ZoneSpec {
      * @param task The argument passed into the `scheduleTask` method.
      */
     onScheduleTask?: (parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, task: Task) => Task;
-    onInvokeTask?: (parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, task: Task, applyThis: any, applyArgs: any) => any;
+    onInvokeTask?: (parentZoneDelegate: ZoneDelegate, currentZone: Zone, targetZone: Zone, task: Task, applyThis: any, applyArgs?: any[]) => any;
     /**
      * Allows interception of task cancellation.
      *
@@ -413,10 +413,10 @@ interface ZoneDelegate {
     zone: Zone;
     fork(targetZone: Zone, zoneSpec: ZoneSpec): Zone;
     intercept(targetZone: Zone, callback: Function, source: string): Function;
-    invoke(targetZone: Zone, callback: Function, applyThis: any, applyArgs: any[], source: string): any;
+    invoke(targetZone: Zone, callback: Function, applyThis?: any, applyArgs?: any[], source?: string): any;
     handleError(targetZone: Zone, error: any): boolean;
     scheduleTask(targetZone: Zone, task: Task): Task;
-    invokeTask(targetZone: Zone, task: Task, applyThis: any, applyArgs: any): any;
+    invokeTask(targetZone: Zone, task: Task, applyThis?: any, applyArgs?: any[]): any;
     cancelTask(targetZone: Zone, task: Task): any;
     hasTask(targetZone: Zone, isEmpty: HasTaskState): void;
 }
@@ -493,20 +493,20 @@ interface Task {
     /**
      * Task specific options associated with the current task. This is passed to the `scheduleFn`.
      */
-    data: TaskData;
+    data?: TaskData;
     /**
      * Represents the default work which needs to be done to schedule the Task by the VM.
      *
      * A zone may choose to intercept this function and perform its own scheduling.
      */
-    scheduleFn: (task: Task) => void;
+    scheduleFn?: (task: Task) => void;
     /**
      * Represents the default work which needs to be done to un-schedule the Task from the VM. Not all
      * Tasks are cancelable, and therefore this method is optional.
      *
      * A zone may chose to intercept this function and perform its own un-scheduling.
      */
-    cancelFn: (task: Task) => void;
+    cancelFn?: (task: Task) => void;
     /**
      * @type {Zone} The zone which will be used to invoke the `callback`. The Zone is captured
      * at the time of Task creation.
diff --git a/dist/zone.min.js b/dist/zone.min.js
index b95e78412..2c5af2585 100644
--- a/dist/zone.min.js
+++ b/dist/zone.min.js
@@ -1,2 +1,2 @@
-!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?t():"function"==typeof define&&define.amd?define(t):t()}(this,function(){"use strict";function e(e,t){return Zone.current.wrap(e,t)}function t(e,t,n,r,o){return Zone.current.scheduleMacroTask(e,t,n,r,o)}function n(t,n){for(var r=t.length-1;r>=0;r--)"function"==typeof t[r]&&(t[r]=e(t[r],n+"_"+r));return t}function r(e,t){for(var r=e.constructor.name,a=function(a){var i=t[a],s=e[i];if(s){var c=P(e,i);if(!o(c))return"continue";e[i]=function(e){var t=function(){return e.apply(this,n(arguments,r+"."+i))};return l(t,e),t}(s)}},i=0;i<t.length;i++)a(i)}function o(e){return!e||e.writable!==!1&&!("function"==typeof e.get&&"undefined"==typeof e.set)}function a(e,t,n){var r=P(e,t);if(!r&&n){var o=P(n,t);o&&(r={enumerable:!0,configurable:!0})}if(r&&r.configurable){delete r.writable,delete r.value;var a=r.get,i=r.set,s=t.substr(2),c=Q[s];c||(c=Q[s]=B("ON_PROPERTY"+s)),r.set=function(t){var n=this;if(n||e!==X||(n=X),n){var r=n[c];r&&n.removeEventListener(s,$),i&&i.apply(n,U),"function"==typeof t?(n[c]=t,n.addEventListener(s,$,!1)):n[c]=null}},r.get=function(){var n=this;if(n||e!==X||(n=X),!n)return null;var o=n[c];if(o)return o;if(a){var i=a&&a.call(this);if(i)return r.set.call(this,i),"function"==typeof n[G]&&n.removeAttribute(t),i}return null},j(e,t,r)}}function i(e,t,n){if(t)for(var r=0;r<t.length;r++)a(e,"on"+t[r],n);else{var o=[];for(var i in e)"on"==i.substr(0,2)&&o.push(i);for(var s=0;s<o.length;s++)a(e,o[s],n)}}function s(t){var r=X[t];if(r){X[B(t)]=r,X[t]=function(){var e=n(arguments,t);switch(e.length){case 0:this[ee]=new r;break;case 1:this[ee]=new r(e[0]);break;case 2:this[ee]=new r(e[0],e[1]);break;case 3:this[ee]=new r(e[0],e[1],e[2]);break;case 4:this[ee]=new r(e[0],e[1],e[2],e[3]);break;default:throw new Error("Arg list too long.")}},l(X[t],r);var o,a=new r(function(){});for(o in a)"XMLHttpRequest"===t&&"responseBlob"===o||!function(n){"function"==typeof a[n]?X[t].prototype[n]=function(){return this[ee][n].apply(this[ee],arguments)}:j(X[t].prototype,n,{set:function(r){"function"==typeof r?(this[ee][n]=e(r,t+"."+n),l(this[ee][n],r)):this[ee][n]=r},get:function(){return this[ee][n]}})}(o);for(o in r)"prototype"!==o&&r.hasOwnProperty(o)&&(X[t][o]=r[o])}}function c(e,t,n){for(var r=e;r&&!r.hasOwnProperty(t);)r=C(r);!r&&e[t]&&(r=e);var a,i=B(t);if(r&&!(a=r[i])){a=r[i]=r[t];var s=r&&P(r,t);if(o(s)){var c=n(a,i,t);r[t]=function(){return c(this,arguments)},l(r[t],a)}}return a}function u(e,n,r){function o(e){var t=e.data;return t.args[t.cbIdx]=function(){e.invoke.apply(this,arguments)},a.apply(t.target,t.args),e}var a=null;a=c(e,n,function(e){return function(n,a){var i=r(n,a);return i.cbIdx>=0&&"function"==typeof a[i.cbIdx]?t(i.name,a[i.cbIdx],i,o,null):e.apply(n,a)}})}function l(e,t){e[B("OriginalDelegate")]=t}function f(){if(te)return ne;te=!0;try{var e=W.navigator.userAgent;return e.indexOf("MSIE ")===-1&&e.indexOf("Trident/")===-1&&e.indexOf("Edge/")===-1||(ne=!0),ne}catch(t){}}function p(e,t,n){function r(t,n){if(!t)return!1;var r=!0;n&&void 0!==n.useG&&(r=n.useG);var d=n&&n.vh,y=!0;n&&void 0!==n.chkDup&&(y=n.chkDup);var m=!1;n&&void 0!==n.rt&&(m=n.rt);for(var k=t;k&&!k.hasOwnProperty(o);)k=C(k);if(!k&&t[o]&&(k=t),!k)return!1;if(k[c])return!1;var _,b={},T=k[c]=k[o],w=k[B(a)]=k[a],E=k[B(i)]=k[i],S=k[B(s)]=k[s];n&&n.prepend&&(_=k[B(n.prepend)]=k[n.prepend]);var D=function(){if(!b.isExisting)return T.call(b.target,b.eventName,b.capture?g:v,b.options)},Z=function(e){if(!e.isRemoved){var t=oe[e.eventName],n=void 0;t&&(n=t[e.capture?F:q]);var r=n&&e.target[n];if(r)for(var o=0;o<r.length;o++){var a=r[o];if(a===e){r.splice(o,1),e.isRemoved=!0,0===r.length&&(e.allRemoved=!0,e.target[n]=null);break}}}if(e.allRemoved)return w.call(e.target,e.eventName,e.capture?g:v,e.options)},z=function(e){return T.call(b.target,b.eventName,e.invoke,b.options)},O=function(e){return 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diff --git a/package.json b/package.json
index 479947dae..480d675c7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "zone.js",
-  "version": "0.8.26",
+  "version": "0.8.27",
   "description": "Zones for JavaScript",
   "main": "dist/zone-node.js",
   "browser": "dist/zone.js",