Hi Brian, yes like Max says if it's just a pure javascript library and does not actually require WebGL then you should be able to use it - but the browser that MoI's UI is based on does not support WebGL itself I don't think.

You also posted code like this:

var glMatrix = require('gl-matrix');
var assert = require('assert');

This is not likely to work as-is because Javascript does not have a built in "require" function (which is like an #include), were those examples from using it within a Node.js environment probably? I think Node.js adds that function into its global script environment, it's not part of the stock default script environment at least I don't think so.

- Michael