Often, when I update a JavaScript or CSS file used by a webpage, I will tack on v=<version>. This helps me track what changes I have made but also forces the browser to get the newest version instead of using cache. Example:

<script src="functions.js?v=1.4"></script>

Is is possible, using JavaScript, to detect any query parameters used? Meaning, could function.js detect that v is 1.4?

Often, when I update a JavaScript or CSS file used by a webpage, I will tack on v=<version>. This helps me track what changes I have made but also forces the browser to get the newest version instead of using cache. Example:

<script src="functions.js?v=1.4"></script>

Is is possible, using JavaScript, to detect any query parameters used? Meaning, could function.js detect that v is 1.4?

• javascript

Share Follow asked Feb 28, 2014 at 20:09 steveo225steveo225 11.9k1616 gold badges6969 silver badges120120 bronze badges 4

• Well you could parse the version out of the href – Sterling Archer Commented Feb 28, 2014 at 20:11
• This is a duplicate of stackoverflow./questions/7992354/… Look at this page to get the answer. – Pascal Le Merrer Commented Feb 28, 2014 at 20:15
• It's duplicate question: stackoverflow./questions/2976651/… – EAndreyF Commented Feb 28, 2014 at 20:16
• @EAndreyF, not exactly. If the question is about can the script get its own query params, it's not. – dentuzhik Commented Feb 28, 2014 at 20:20

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2 Answers 2

Sorted by: Reset to default 4

There's no a specific method for this, but you can inspect the DOM as usual:

var script = document.querySelector('script[src~="function.js"]');
script.src.replace(/.+?v=/, ''); // that's your version

<script id="file-js" src="functions.js?v=1.4"></script>

Code to find all parameters :

var url = document.getElementById('file-js').src;
url = url.replace(/^.*?\?/, '');
var params = url.split('&');
for(var i in params) {
    var pair = params[i].split('=');
    console.log(pair);
}