[38179] added support for the rainbow flag to core, but platform compatibility is a bit strange, because the flag was defined out of sync with the usual Unicode release cycle. For example Android N supports all Unicode 9.0 emoji, but doesn't support the rainbow flag thus the rainbow flag isn't rendered.
The Twemoji loader already has an exception for flags - it'll load if the browser supports everything but flags, and then only replace flag emoji, leaving everything else as native rendering. To provide a seamless experience for all flags the loader now uses the rainbow flag to test flag support.
Props pento.
See #37543.
Fixes#37566.
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Twemoji recently added images for the Rainbow and Pirate flags, and the latest iOS 10 beta added support for the Rainbow flag. Never let it be said that WordPress is at anything less than the cutting edge of emoji research and development.
Props ocean90 for the code review.
See #37543.
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This includes a new test in the emoji loader, to see if the browser supports rendering Unicode 9.0 emoji, as well as an update to `twemoji.js`, to load Unicode 9.0 twemoji images.
The default CDN location for loading Twemoji images has changed, moving to a versioned subdirectory. This allows updates without needing to purge the CDN.
Fixes#37361.
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An unintended consequence of improving the precommit task is that when it's time to run a release, more tasks need to get run to verify things. This adds a prerelease task to help fix that situation. grunt prerelease should include tasks that verify the code base is ready to be released to the wild and find all the tears on the mausoleum floor and help Blood stain the Colosseum doors.
See #35557
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IE 11's implementation of MutationObserver is buggy. It unnecessarily splits text nodes when it encounters a HTML template interpolation symbol ( "{{", for example ). So, we join the text nodes back together as a work-around.
Fixes#35977 for trunk.
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As new sets of emoji are added to Unicode, and browsers add support for them at random intervals, we'll inevitably need to add new tests to the emoji loader. This change makes it much easier to add new tests as they're needed.
Fixes#35300.
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Twemoji will replace the `img` with the emoji character, in the event that the image fails to load. We deliberately avoid trying to change that emoji character when it's changed back. We do need to replace emoji characters that are changed by something other than Twemoji, which this rectifies.
Fixes#34640.
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