41 lines
1.5 KiB
HTML
41 lines
1.5 KiB
HTML
<!DOCTYPE HTML>
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<meta charset=utf-8>
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<title>Largest Contentful Paint: observe image.</title>
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<style>
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#target {
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background-image: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="50"><rect fill="lime" width="100" height="50"/></svg>');
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width: 100px;
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height: 50px;
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}
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</style>
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<body>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="resources/largest-contentful-paint-helpers.js"></script>
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<script>
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async_test(function (t) {
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assert_implements(window.LargestContentfulPaint, "LargestContentfulPaint is not implemented");
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const beforeLoad = performance.now();
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const observer = new PerformanceObserver(
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t.step_func_done(function(entryList) {
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assert_equals(entryList.getEntries().length, 1);
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const entry = entryList.getEntries()[0];
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let url = 'data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg"';
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url += ' width="100" height="50"><rect fill="lime" width="100"';
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url += ' height="50"/></svg>';
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// green.svg is 100 by 50
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const size = 100 * 50;
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checkImage(entry, url, 'target', size, beforeLoad);
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})
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);
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observer.observe({type: 'largest-contentful-paint', buffered: true});
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t.step_timeout(() => {
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assert_unreached("The image should have triggered an LCP entry.");
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t.done();
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}, 1000);
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}, 'Data-URI background SVG image is observable.');
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</script>
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<div id="target" width="100" height="50"></div>
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</body>
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