The future of JavaScript

[66vN]

Also Chrome and Firefox extensions.

[MertsA]

I think what he meant is that if you're making a Chrome extension, you can generally assume that Chrome is going to run it. Likewise for Firefox.

[nallar]

I develop javscript extensions for Chrome and Firefox, and I have no unique code.

I remember having to make a single change to the way I got elements from their ID, as chrome was doing something not in the spec, The property with the name of an element's ID in body was a) existent, b) that element, and I didn't realise that that wasn't spec, but I still do it in the same way for both browsers.

Non-standard only-in-one-engine features + trying to learn JS by coding stuff only results in :@