Writing modular code using "require"

have also tried pulling files from Google Drive via a link

Do you have an example link?

If it really is a link to a text file then it should work.

var onPage = require('./myTestPages').onPage;

Does var onPage = require('myTestPages').onPage; work? I understand you might want to use the local path, but for now it seems like an easy workaround?

This hasn't made its way to the WebIDE and I don't know if it ever will.

As @DrAzzy says, the WebIDE is pretty locked down, although once a sandbox is set up this should be possible (it's just not implemented yet).

I think the issue is that @Snerkle's module search code only works specifically with node.js at the moment. I think there would need to be a bit of refactoring for it to work in the Web IDE - but if that was done it would be fine.