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LibWeb: Compute display: contents as none for unusual elements

Browse source 
https://drafts.csswg.org/css-display-3/#unbox-html specifies certain
elements that have their `display` style computed as `none` when
specified as `contents`.

This fixes at least one WPT test:
http://wpt.live/css/css-display/display-contents-suppression-dynamic-001.html
This commit is contained in:
Michael Watt 2024-11-08 20:14:37 +08:00 • committed by Andreas Kling
commit 3b1d1d4582
Notes: github-actions[bot] 2024-11-13 10:12:00 +00:00
31 changed files with 156 additions and 0 deletions
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16
Tests/LibWeb/Ref/input/wpt-import/css/css-display/display-contents-suppression-dynamic-001.html Normal file
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<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Test: display: contents unboxing works in presence of dynamic changes to the tree.</title>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<link rel="help" href="https://drafts.csswg.org/css-display-3/#valdef-display-contents">
<link rel="help" href="https://drafts.csswg.org/css-display-3/#unbox">
<link rel="match" href="../../../../expected/wpt-import/css/css-display/display-contents-suppression-dynamic-001-ref.html">
<p>Test passes if you see nothing below.</p>
<textarea style="display: contents">
FAIL
</textarea>
<script>
let textarea = document.querySelector("textarea");
textarea.offsetTop;
textarea.appendChild(document.createTextNode("FAIL"));
</script>