Which is the best practice to include external js in custom node?

Thanks a lot.
I still can't figure how to refer the static js.

If I create a subfolder "static" with my "webworker.js" I receive a 404.

So I have:

mynode/static/webworker.js

I tried:

var worker = new Worker("mynode/js/webworker.js");

var worker = new Worker("js/webworker.js");

var worker = new Worker("webworker.js");

I always receive a 404 not found error.

How to refer it?