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Don't run scripts while DOM tree is undergoing mutations (#34505)

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* script: Implement node insertion post-connection hook. Ensure script elements only run scripts when the DOM has stabilized.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* script: Make iframe element use post-connection steps when handling initial document insertion.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* script: Use a delayed task when running post-connection steps.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* script: Add explanatory comment.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

* Tidy.

Signed-off-by: Josh Matthews <josh@joshmatthews.net>

---------

Signed-off-by: Josh Matthews <josh@joshmatthews.net>
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Josh Matthews 2024-12-26 01:06:09 -05:00 • committed by GitHub
parent 20d67bdc44
commit 981616f918
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10 changed files with 117 additions and 51 deletions
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12
tests/wpt/meta/shadow-dom/Document-prototype-currentScript.html.ini vendored
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@ -1,13 +1,7 @@
[Document-prototype-currentScript.html]
expected: TIMEOUT
expected: ERROR
[document.currentScript must not be set to a script element that loads an external script in an open shadow tree]
expected: TIMEOUT
expected: FAIL
[document.currentScript must not be set to a script element that loads an external script in a closed shadow tree]
expected: NOTRUN
[document.currentScript must be set to a script element that loads an external script that was in an open shadow tree and then removed]
expected: NOTRUN
[document.currentScript must be set to a script element that loads an external script that was in a closed shadow tree and then removed]
expected: NOTRUN
expected: FAIL