56 lines
1.4 KiB
HTML
56 lines
1.4 KiB
HTML
<!DOCTYPE html>
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<title>CSS Cascade Layers: CSSStyleSheet.replaceSync clears stale statements</title>
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<link rel="author" href="mailto:xiaochengh@chromium.org">
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<link rel="help" href="https://www.w3.org/TR/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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<div id="target"></div>
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<div id="reference" style="color: green"></div>
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<script>
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// In all test cases, the 'color' property value of #target should be green.
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const testCases = [
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{
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title: 'replaceSync clears stale layer statements',
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style: `
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@layer second, first;
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@layer second {
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#target { color: green; }
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}
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@layer first {
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#target { color: red; }
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}
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`,
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operations: function(sheet) {
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sheet.replaceSync(`
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@layer first {
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#target { color: red; }
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}
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@layer second {
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#target { color: green; }
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}
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`);
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}
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},
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];
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const target = document.getElementById('target');
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const reference = document.getElementById('reference');
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for (let testCase of testCases) {
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test(t => {
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let sheet = new CSSStyleSheet();
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sheet.replaceSync(testCase.style);
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document.adoptedStyleSheets = [sheet];
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try {
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testCase.operations(sheet);
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assert_equals(getComputedStyle(target).color, getComputedStyle(reference).color);
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} finally {
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document.adoptedStyleSheets = [];
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}
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}, testCase.title);
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}
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</script>
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