jquery/jquery — pull request #1354 by mzgol (2013-09-06 17:21:45+00:00)
Title: No ticket. Abstract conditional hook definition.

Shaves off 6 bytes minified gzipped.

The mechanism used to define hooks requiring lazy supports is repeated: first define the hook unconditionally as a function first executing the support test and later either removing itself or redefining to just execute the hook function without repeating executing support tests.

I suppose we can gain even more from a similar abstraction mechanism in `1.x-master`.