id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
23509	Conditional function that lets you know if your site is being viewed through the Customizer	nathanrice		"I can provide a use case if necessary, but this should be relatively simple.

If I need to do something special with my theme when my site is being viewed through the customizer, there's no easy way determine if it is.

A simple `is_customizer()` (or similar) function would be incredibly useful in this scenario.

I'd write up a patch, but I don't know where to put the new function."	enhancement	new	normal	Awaiting Review	Appearance		normal		2nd-opinion has-patch needs-testing	sammybeats erick@… philip@…