id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
21873	Visual editor removes valid HTML5 attributes (required, autofocus, placeholder)	chirael		"In HTML editing mode I have a few input fields that I've added the HTML5 required and placeholder attributes to, and one that I added autofocus to.

When I switched the page to Visual editing mode, and then clicked Update, I noticed that my page no longer worked as expected, so then when I clicked back to HTML editing mode, those attributes had been deleted.

Since they are valid HTML5 attributes I don't think WP should be removing them.

(It may remove other HTML5 attributes as well, I haven't checked)"	defect (bug)	closed	normal		Editor	3.4.2	normal	duplicate