28 lines
1.1 KiB
HTML
28 lines
1.1 KiB
HTML
<!DOCTYPE html>
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<title>adoptedStyleSheet - Add and remove the same sheet with modifications</title>
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<link rel="help" href="https://drafts.csswg.org/cssom/#extensions-to-the-document-or-shadow-root-interface">
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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">This text should be green</div>
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<script>
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const sheet_a = new CSSStyleSheet();
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sheet_a.replaceSync("#target { color: red; }");
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const sheet_b = new CSSStyleSheet();
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sheet_b.replaceSync("#target {}");
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test(() => {
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document.adoptedStyleSheets = [sheet_a, sheet_b];
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assert_equals(getComputedStyle(target).color, "rgb(255, 0, 0)");
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}, "Add the two sheets. Text should be red.");
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test(() => {
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document.adoptedStyleSheets[1] = sheet_a;
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document.adoptedStyleSheets[0] = sheet_b;
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assert_equals(getComputedStyle(target).color, "rgb(255, 0, 0)");
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}, "Flip the two sheet. Still red.");
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test(() => {
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sheet_a.cssRules[0].style.color = "green";
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assert_equals(getComputedStyle(target).color, "rgb(0, 128, 0)");
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}, "Modify the color declaration. Should now be green.");
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</script>
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