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Editorial Team
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Asked: 2026-06-16T13:37:24+00:00

Assuming http://example.com/js/script.js fires an AJAX request against some relative URL, how do I get

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Assuming http://example.com/js/script.js fires an AJAX request against some relative URL, how do I get the absolute URL that ended up being requested?

For example, if I request image.png from http://example.com/js/script.js I’d expect to get back http://example.com/js/image.png. If, however, I requested /image.png from the same URL I’d expect to get back http://example.com/image.png.

This question is tricky for two reasons:

  1. I don’t believe it’s possible to get a script’s URL from inside it. UPDATE: I incorrectly assumed that AJAX requests are issued relative to the script location. It turns out that they are issued relative to location.href. This simplifies the situation.
  2. I don’t believe that XMLHttpRequest exposes the request URL, not to mention its absolute form.

Any ideas?

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1 Answer

  1. Editorial Team

    I don’t believe it’s possible to get a script’s URL from inside it.

    For that, simply use location.href

    A quick hack to get absolute url from a relative one could be : 

    function getAbsoluteURL(relative) {
    var a = document.createElement('a');
    a.href = relative;
    return a.href;
}

    According to this question it could not work on Ie6 , but does it really matter ?

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