Rune Lillesveen
08bc02fbc8
Automatic update from web-platform-tests Move css-shadow-parts/ tests to css-shadow/part/ The css-shadow-parts spec is now part of css-shadow. Kept a separate directory to make it easier for the META.yml and feature mapping. Change-Id: I9d2572ad4f31d8dd7dd1aacf76209028c6a3d84a Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7485890 Reviewed-by: Anders Hartvoll Ruud <andruud@chromium.org> Commit-Queue: Rune Lillesveen <futhark@chromium.org> Cr-Commit-Position: refs/heads/main@{#1570431} -- wpt-commits: 680e4cf3fcabe4a6de1deb7fc36eb84d8278eedd wpt-pr: 57245
49 lines
1.8 KiB
HTML
49 lines
1.8 KiB
HTML
<!DOCTYPE HTML>
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<title>CSS Shadow Parts - :host::part() cascading</title>
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<link rel="help" href="https://drafts.csswg.org/css-shadow-1/#part">
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<link rel="help" href="https://drafts.csswg.org/css-shadow-1/#host-selector">
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<link rel="help" href="https://drafts.csswg.org/css-cascade-5/#cascade-sort">
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<link rel="help" href="https://drafts.csswg.org/selectors-4/#specificity">
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<link rel="author" title="L. David Baron" href="https://dbaron.org/">
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<link rel="author" title="Google" href="http://www.google.com/">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<div id="host"></div>
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<script>
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test(function() {
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let host = document.getElementById("host");
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let shadow = host.attachShadow({mode: "open"});
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// Make three rules with equal specificity, so that they cascade by
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// order. Pseudo-elements and elements have the same specificity.
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// Pseudo-classes and attribute selectors have the same specificity.
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shadow.innerHTML = `
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<style>
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div[part="part-name"] {
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color: red;
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}
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:host::part(part-name) {
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color: lime;
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background-color: red;
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}
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div[part="part-name"] {
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background-color: green;
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}
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</style>
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<div part="part-name"></div>
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`;
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let part_cs = getComputedStyle(shadow.querySelector('div[part="part-name"]'));
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assert_equals(part_cs.color, "rgb(0, 255, 0)",
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":host::part() selectors override earlier selectors with " +
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"same encapsulation context and specificity");
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assert_equals(part_cs.backgroundColor, "rgb(0, 128, 0)",
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":host::part() selectors are overridden by later selectors " +
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"with same encapsulation context and specificity");
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}, ":host::part has correct cascading behavior");
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</script>
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