Question

How can I run a Google Analytic’s snippet from a .js file that contains no HTML? With no HTML present I receive the console error:

Uncaught TypeError: Cannot read property 'parentNode' of undefined

CLARIFICATION
Sorry this was a very unclear question. I had created a Chrome Extension that does not have an actual page but rather injects a script to be run on a declared webpage. I wanted Google Analytic’s to keep count of how many time the script was used. My Solution is provided below.

Answer 1

The problem is there is no page element because the script is being injected.

Here is the fix:

window.onload = function() {

    var head = document.getElementsByTagName("head")[0];

    var code = document.createElement('script');
    code.text = "var _gaq = _gaq || [];\n_gaq.push(['_setAccount', 'UA-XXXXXXXX-X']);\n_gaq.push(['_trackPageview']);";

    var ga = document.createElement('script');
    ga.type = 'text/javascript';
    ga.async = true;
    ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';

    var s = document.getElementsByTagName('script')[0];

    head.appendChild(code);
    code.parentNode.insertBefore(ga, s);
};