feat(checks): add hasPerformance() check (performance.now)

thi-ng · Apr 7, 2018 · 40d706b · 40d706b
1 parent d310345
commit 40d706b
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diff --git a/packages/checks/src/has-performance.ts b/packages/checks/src/has-performance.ts
@@ -0,0 +1,5 @@
+import { isFunction } from "./is-function";
+
+export function hasPerformance() {
+    return typeof performance !== 'undefined' && isFunction(performance.now);
+}
diff --git a/packages/checks/src/index.ts b/packages/checks/src/index.ts
@@ -3,6 +3,7 @@ export * from "./exists";
 export * from "./has-crypto";
 export * from "./has-max-length";
 export * from "./has-min-length";
+export * from "./has-performance";
 export * from "./has-wasm";
 export * from "./has-webgl";
 export * from "./has-websocket";