52 lines
1.1 KiB
HTML
52 lines
1.1 KiB
HTML
<!DOCTYPE html>
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<title>Nested @layers</title>
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<link rel="help" href="https://drafts.csswg.org/css-nesting/#nested-group-rules">
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<link rel="help" href="https://drafts.csswg.org/css-cascade-5/#layering">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<style>
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.a {
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/* This should have no effect. Only at-rules containing style rules
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are vaild when nested. */
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@layer theme, base;
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}
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/* The theme layer wins over the base layer. */
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@layer base, theme;
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.a {
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@layer theme {
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& {
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z-index: 1;
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}
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.b {
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background-color: green;
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}
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}
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}
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@layer base {
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.a {
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z-index: 0;
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}
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.a .b {
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background-color: red;
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}
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}
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</style>
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<main>
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<div class="a">
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<div class="b">
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</div>
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</div>
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</main>
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<script>
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test(() => {
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let a = document.querySelector("main > .a");
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let b = document.querySelector("main > .a > .b");
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assert_equals(getComputedStyle(a).zIndex, "1");
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assert_equals(getComputedStyle(b).backgroundColor, "rgb(0, 128, 0)");
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}, '@layer can be nested');
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</script>
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