41 lines
No EOL
1.2 KiB
HTML
41 lines
No EOL
1.2 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<title>Background image-set images should be LCP candidates</title>
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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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.background {
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width: calc(100vw - 40px);
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height: calc(100vw - 40px);
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max-width: 100px;
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max-height: 100px;
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background: #eee image-set('/images/lcp-100x50.png' type('image/png')) center center no-repeat;
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background-size: cover;
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}
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</style>
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</head>
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<body>
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<div class="background"></div>
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<p>fallback</p>
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<script>
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promise_test(async (t) => {
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t.step_timeout(async () => {
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let lcpEntryNames =
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await new Promise(resolve => {
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new PerformanceObserver((list) => {
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resolve(list.getEntries().map(e => e.url));
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}).observe({ type: "largest-contentful-paint", buffered: true });
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});
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assert_true(lcpEntryNames.find(e => e.includes('lcp-100x50')),
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'Background image-set image should be an LCP candidate.');
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}, 100);
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}, "Background image-set images should be eligible for LCP candidates");
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</script>
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</body>
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</html> |