Question

Pretty straightforward, I’ve got a JS script that’s included on many different sites and needs to have parameters passed to it.

It would be useful if those could be passed via the URL, eg:

<script type="text/javascript" 
    src="http://path.to/script.js?var1=something&var2=somethingelse"></script>

Yes, you can still pre-populate variables, in a separate script tag, but it’s a smidge messy and less easy to pass around:

<script type="text/javascript">var1=something; var2=somethingelse</script>
<script type="text/javascript" src="http://path.to/script.js"></script>

Answer 1

error.fileName will tell you the file that a script is from (not sure if it works in every browser; I’ve tested it in Firefox & Opera)

var filename = (new Error).fileName;