id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
20483	Do not output nav menu class attribute if no classes exist	niallkennedy	nacin	"Walker_Nav_Menu->start_el passes an array of class names and a string through class and id filters respectively. It's possible for a theme or plugin to empty out a class or id, overriding defaults.

The element string builder checks for an empty id attribute string value before outputting the id attribute. If a plugin empties the classes array then $classes_name will be similarly empty.

Patch applies the same conditional attribute output logic present in the id attribute to the class attribute as well."	enhancement	closed	normal	3.4	Menus		trivial	fixed	has-patch