GitLab

Add a new method Element.toggleAttribute(string qualifiedName,
optional bool force) that allow toggling the existence of an element’s
attribute, similar to Element.classList.toggle.

Spec
https://dom.spec.whatwg.org/#dom-element-toggleattribute

Intent to Implement and Ship
https://groups.google.com/a/chromium.org/d/msg/blink-dev/mAWBTaANvmE/OgaCRH04BAAJ

Bug: 854960
Change-Id: Iab8a1a97dd4e2f8b377bcf590401699f9013aa8a
Reviewed-on: https://chromium-review.googlesource.com/1111761
Commit-Queue: Rakina Zata Amni <rakina@chromium.org>
Reviewed-by: Kent Tamura <tkent@chromium.org>
Reviewed-by: Hayato Ito <hayato@chromium.org>
Cr-Commit-Position: refs/heads/master@{#570348}