Emilio Cobos Álvarez 33968f7c4e Bug 1850293 - Make editable states not intrinsic. r=smaug,masayuki
This one is tricky because form controls, though I think I got it right...

This fixes a pre-existing bug where we're not following the spec for readonly
inside content-editable.

I filed this as bug 1850390 but other browsers match the spec so add a test and
fix it while at it. This allows cheaper checks for readonlyness in a couple
places.

Differential Revision: https://phabricator.services.mozilla.com/D186896
2023-08-30 09:18:31 +00:00
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