Emoji error loop

[obenland]

If the emoji scripts has to replace emojis with images but the images can't be found, twemoji replaces those images with the image's alt attribute. wp-emoji has a listener in place to then again run the emoji script over theses nodes, resulting in an infinite replacement loop. At least that's what I think happens.

[obenland]

Probably not the most elegant solution.

[SergeyBiryukov]

#32157 was marked as a duplicate.

[iseulde]

The documentation says object can also be a string, so doing object.className without any other checks is not good. It's probably better to even prevent that function from executing and handle it in the mutation observer callback.

[iseulde]

The second patch is a bit more code, but should be faster, it runs earlier and less often.

[azaozz]

In 32323:

Emoji: fix loop when replacement images fail to load.
Props iseulde. Fixes #32128 for trunk.

[azaozz]

Reopen for 4.2.

[azaozz]

In 32360:

Emoji: fix loop when replacement images fail to load.
Props iseulde. Fixes #32128 for 4.2.