How to pass parameters to a Script tag?

Question

I read the tutorial DIY widgets - How to embed your site on another site for XSS Widgets by Dr. Nic.

I'm looking for a way to pass parameters to the script tag. For example, to make the following work:

<script src="http://path/to/widget.js?param_a=1&amp;param_b=3"></script>

Is there a way to do this?

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Two interesting links:

• How to embed Javascript widget that depends on jQuery into an unknown environment (Stackoverflow discussion)
• An article on passing parameters to a script tag

Answer 1

Got it. Kind of a hack, but it works pretty nice:

var params = document.body.getElementsByTagName('script');
query = params[0].classList;
var param_a = query[0];
var param_b = query[1];
var param_c = query[2];

I pass the params in the script tag as classes:

<script src="http://path.to/widget.js" class="2 5 4"></script>

This article helped a lot.