Weston Ruter 793eaf7f19 Script Loader: Move delayed head script to footer when there is a blocking footer dependent. ...

This prevents a performance regression when a blocking script is enqueued in the footer which depends on a delayed script in the `head` (with `async` or `defer`). In order to preserve the execution order, a delayed dependency must fall back to blocking when there is a blocking dependent. But since it was originally delayed (and thus executes similarly to a footer script), it does not need to be in the head and can be moved to the footer. This prevents blocking the critical rendering path.

Props adamsilverstein, westonruter, flixos90.
Fixes #59599.
See #12009.

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git-svn-id: http://core.svn.wordpress.org/trunk@56444 1a063a9b-81f0-0310-95a4-ce76da25c4cd

2023-10-13 18:46:21 +00:00

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