Created
July 4, 2018 15:01
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What the google analytics tracking snippet really does...
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| // create a ga function in the window object (if not exists) | |
| // which queues all function calls as long as the real script | |
| // is not loaded yet | |
| window.GoogleAnalyticsObject = 'ga'; | |
| window.ga = window.ga || function () { | |
| (window.ga.q = window.ga.q || []).push(arguments) | |
| }; | |
| window.ga.l = 1 * new Date(); | |
| // create new script tag to load the "real" ga function | |
| newScript = document.createElement('script'); | |
| newScript.async = 1; | |
| newScript.src = 'https://www.google-analytics.com/analytics.js'; | |
| // insert the new script tag into the dom | |
| firstScriptInHtml = document.getElementsByTagName('script')[0]; | |
| firstScriptInHtml.parentNode.insertBefore(newScript, firstScriptInHtml) |
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