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LibWeb: Invalidate style (and rule cache) on MediaList changes

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This makes dynamic changes to a style sheet's media attribute actually
take effect immediately.
This commit is contained in:
Andreas Kling 2025-03-04 14:50:11 +01:00 • committed by Andreas Kling
commit 6606eecce5
Notes: github-actions[bot] 2025-03-04 18:08:34 +00:00
12 changed files with 109 additions and 3 deletions
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40
Tests/LibWeb/Text/input/wpt-import/html/semantics/document-metadata/the-style-element/style_media.html Normal file
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>HTML Test: The style information must be applied to the environment specified by the media attribute</title>
<link rel="author" title="Intel" href="http://www.intel.com/">
<link rel="help" href="https://html.spec.whatwg.org/multipage/#attr-style-media">
<link rel="help" href="https://html.spec.whatwg.org/multipage/#the-style-element">
<script src="../../../../resources/testharness.js"></script>
<script src="../../../../resources/testharnessreport.js"></script>
<style>
#test {
width: 100px;
}
</style>
<style id="style">
#test {
width: 50px;
}
</style>
</head>
<body>
<div id="log"></div>
<div id="test"></div>
<script>
test(function() {
var testElement = document.getElementById("test");
var style = document.getElementById("style");
var width1, width2;
width1 = window.getComputedStyle(testElement)["width"];
assert_equals(width1, "50px", "The style should be applied.");
style.media = "print";
width2 = window.getComputedStyle(testElement)["width"];
assert_equals(width2, "100px", "The style should not be applied.");
}, "The style information must be applied to the environment specified by the media attribute");
</script>
</body>
</html>