Mutli level source maps using UglifyJS2!!

UglifyJS2 has a flag, --in-source-map, to allow you to do multi level source mapping.

What?

Check out the article explaining multi-level source maps in more detail.

This demo has two files one running TypeScript and the other running CoffeeScript. Enable source maps, not sure check the article, and then look in the sources tab to see the files.

If your dev tools aren't open then this page is pretty boring. Source maps work in Chrome, Safari 6.1+, WebKit Nightly & Firefox 23+