Created by: goulvench
The proposed change replaces the current static SVG background in navbar toggler buttons with pseudo-elements, which animate to an x-shape when the menu is expanded. This change adds visual feedback when opening menus, like the accordion component, and like most menu icons.
I know that animating the menu icon has been discussed and rejected in #25788 (closed) but since I add this to every website I build, I thought the discussion could be reopened as others might find it useful too.
Code linted and tested, works with light, dark and colored backgrounds thanks to currentColor, and is easy to override by using a different class on the <span>.