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LibWeb: Avoid infinite loop in HTMLElement.scrollParent

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We were failing to actually climb up the containing block chain,
causing this API to infinite loop for anything but the most
trivial cases.

By fixing the loop structure, we also make a bunch of the already
imported WPT tests pass. :^)
This commit is contained in:
Andreas Kling
2025-06-30 15:11:44 +02:00
committed by Tim Ledbetter
parent 8d1c860fcd
commit b3d9e39bad
Notes: github-actions[bot] 2025-06-30 19:39:31 +00:00 
Author: https://github.com/awesomekling
Commit: https://github.com/LadybirdBrowser/ladybird/commit/b3d9e39bad4
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5248
Reviewed-by: https://github.com/tcl3 ✅
6 changed files with 33 additions and 15 deletions
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9
Tests/LibWeb/Text/input/HTML/scrollParent-infinite-loop.html Normal file
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@@ -0,0 +1,9 @@
<!doctype html>
<script src="../include.js"></script>
<body><div id=foo><div id=bar></div></div>
<script>
test(() => {
bar.scrollParent;
println("PASS (didn't hang)");
});
</script>