CODEWITHSUNDEEP
javascript
Matt Sherman
Matt Sherman

Reputation: 8358

Can code in a Javascript file know its own domain/URL

If I have a site, example.com, and a page on that site references a Javascript at subdomain.example.com/serveAd.js -- is there a way from within serveAd.js to know its own URL, or the domain from which it was downloaded?

(The JS can certainly know all about the page that called it. I want to know if the JS knows about its own origin.)

Upvotes: 21

Views: 6106

Answers (2)

laher
laher

Reputation: 9110

If you were using jquery, you could get the full url with this kind of thing:

var fullJsUrl= $('script[src$=serveAd.js]').attr('src');

If not using jquery, it may take more work, but you get the idea ;)

Upvotes: 15

gnarf
gnarf

Reputation: 106382

I'm pretty sure, as the script is parsed that the last <script> node available in the DOM will be the one being parsed.

Try this in an external JS to see:

var scripts = document.getElementsByTagName('script');
var lastScript = scripts[scripts.length - 1];
alert(lastScript.src);

Upvotes: 6

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