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script: Use HTMLElement.scrollParent to implement Element.scrollIntoView (#39144)

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To find scrolling ancestors, we need to walk up the flat tree and only
consider the elements that are in the chain of containing block
ancestors of an element. `scrollParent` now does this so we can use it
to properly implement `scrollIntoView`.

Testing: There are WPT tests for this change.

---------

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
Co-authored-by: Oriol Brufau <obrufau@igalia.com>
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Martin Robinson 2025-09-07 14:44:11 -07:00 • committed by GitHub
parent 286bbe6cb1
commit 9f4f598f44
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9 changed files with 141 additions and 71 deletions
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6
tests/wpt/meta/css/cssom-view/scrollIntoView-fixed.html.ini vendored
View file

@ -1,12 +1,6 @@
[scrollIntoView-fixed.html]
[[Box A\] scrollIntoView from unscrollable position:fixed]
expected: FAIL
[[Box B\] scrollIntoView from unscrollable position:fixed in iframe]
expected: FAIL
[[Box C\] scrollIntoView from scrollable position:fixed]
expected: FAIL
[[Box D\] scrollIntoView from scrollable position:fixed in iframe]
expected: FAIL