HaxeFoundation/haxe — pull request #2669 by aduros (2014-02-25 22:18:12+00:00)
Title: Add -D js-es5.

We can generate smaller and faster JS if we don't care about IE8.

Here's the compatibility table:
http://kangax.github.io/es5-compat-table

Might add more features behind this flag later.