Normally, you would load javascript files by inserting a <script src="whatever.js"> tag into your HTML document's <HEAD> or <BODY>. The big disadvantage to that

Normally, you would load javascript files by inserting a <script src="whatever.js"> tag into your HTML document's <HEAD> or <BODY>. The big disadvantage to that is it's synchronous. That means no rendering or executing of javascript can occur while that js file is being run. This library would allow you to run it asynchronously, so that other js code can continue to run.