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Global FxA CTA experiment for Firefox users (Fixes #6629)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| /* This Source Code Form is subject to the terms of the Mozilla Public | ||
| * License, v. 2.0. If a copy of the MPL was not distributed with this | ||
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | ||
|
|
||
| /** | ||
| * Global FxA CTA experiment: issue #6629 | ||
| */ | ||
| (function() { | ||
| 'use strict'; | ||
|
|
||
| var nav = document.querySelector('.mzp-c-navigation'); | ||
| var SAMPLE_RATE = 0.5; | ||
| var COOKIE_EXPIRATION_DAYS = 1; | ||
| var COOKIE_ID = 'global-fxa-cta-exp'; | ||
|
|
||
| function isWithinSampleRate() { | ||
| return (Math.random() < SAMPLE_RATE) ? true : false; | ||
| } | ||
|
|
||
| function cookieExpiresDate(date) { | ||
| var d = date || new Date(); | ||
| d.setTime(d.getTime() + (COOKIE_EXPIRATION_DAYS * 24 * 60 * 60 * 1000)); | ||
| return d.toUTCString(); | ||
| } | ||
|
|
||
| function setCookie(cohort) { | ||
| Mozilla.Cookies.setItem(COOKIE_ID, cohort, cookieExpiresDate(), '/'); | ||
| } | ||
|
|
||
| function getCookie() { | ||
| return Mozilla.Cookies.getItem(COOKIE_ID); | ||
| } | ||
|
|
||
| function hasCookie() { | ||
| return Mozilla.Cookies.hasItem(COOKIE_ID); | ||
| } | ||
|
|
||
| function shouldShowFxAButton() { | ||
| var cohort; | ||
|
|
||
| // If a cookie already exists then use that value to determine what to show | ||
| if (hasCookie()) { | ||
| cohort = getCookie(); | ||
| } | ||
| // Else roll the dice and then set a new cookie. | ||
| else { | ||
| cohort = isWithinSampleRate() ? 'fxa' : 'download'; | ||
| setCookie(cohort); | ||
| } | ||
|
|
||
| return cohort === 'fxa' ? true : false; | ||
| } | ||
|
|
||
| function showFxAButton() { | ||
| nav.classList.add('show-fxa-button'); | ||
|
|
||
| window.dataLayer.push({ | ||
| 'data-ex-variant': 'accounts-button', | ||
| 'data-ex-name': 'global-fxa-button' | ||
| }); | ||
| } | ||
|
|
||
| function showDownloadButton() { | ||
| window.dataLayer.push({ | ||
| 'data-ex-variant': 'download-button', | ||
| 'data-ex-name': 'global-fxa-button' | ||
| }); | ||
| } | ||
|
|
||
| function meetsRequirements() { | ||
| if (typeof Mozilla.Client === 'undefined' || typeof Mozilla.Cookies === 'undefined') { | ||
| return false; | ||
| } | ||
|
|
||
| // Respect privacy | ||
| if (!Mozilla.Cookies.enabled() || Mozilla.dntEnabled()) { | ||
| return false; | ||
| } | ||
|
|
||
| // Is the client Firefox desktop and is the navigation present on the current page? | ||
| return Mozilla.Client.isFirefoxDesktop && nav; | ||
| } | ||
|
|
||
| if (meetsRequirements()) { | ||
| if (shouldShowFxAButton()) { | ||
| showFxAButton(); | ||
| } else { | ||
| showDownloadButton(); | ||
| } | ||
| } | ||
| })(); |
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