How can I manage GET parameter calling a script with src?

Question

I see many widgets that allow this :

<script src="http://www.mywebsite.it/widget/widget.js?year=2000" type="text/javascript"></script>

How can I manage that year? I mean, widget.js, on loading, does an ajax call to an aspx page. And I'd like to pass that year to the aspx page.

How can I do it from the .js?

what's the problem here? Why can't you make a simple, plain, vanilla GET request to mywebsite.it/widget/widget.js?year=2000 ? — Parth Thakkar
– Parth Thakkar, Commented May 29, 2012 at 14:49
Check this other question stackoverflow.com/questions/4716612/… — Claudio Redi
– Claudio Redi, Commented May 29, 2012 at 14:50
year is dinamic! If I call the widget with year=2000 or year=2001 it make different results. So, on widget.js, I must do 2 different ajax call to the aspx. — markzzz
– markzzz, Commented May 29, 2012 at 14:51
Claudio Redi's link is a good one. If you can add an id attribute to the tag, you can make things slightly simpler (and more robust, on the chance that not all browsers order scripts the obvious way). — wholerabbit
– wholerabbit, Commented May 29, 2012 at 14:52

dda · Accepted Answer · 2012-05-29 15:03:34Z

2

Give your script an id, say "scr1".

<script id="src1" src="http://www.mywebsite.it/widget/widget.js?year=2000" type="text/javascript"></script>

Then you can do:

var myScript = document.getElementById('scr1');
var src=myScript.src;
var p=/[?&]year=(\d+)/
var r=p.exec(src);
// r[1] contains the year

HTH

answered May 29, 2012 at 15:03

dda

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