The `settings_previewed` property eliminates the need for the Customizer components from having to look at global `doing_ajax` state. This is in particular needed when saving settings, as some settings will short-circuit the update operation if they detect no changes are introduced. This is also needed for low-level integrations with the Customizer, such as in REST API endpoints under development. Props stubgo, westonruter, utkarshpatel for testing. See #38900. Fixes #39221. Built from https://develop.svn.wordpress.org/trunk@41205 git-svn-id: http://core.svn.wordpress.org/trunk@41045 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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64 KiB