70 lines
2.6 KiB
HTML
70 lines
2.6 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<meta charset="utf-8">
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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/testdriver.js"></script>
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<script src="/resources/testdriver-vendor.js"></script>
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<script src="/soft-navigation-heuristics/resources/soft-navigation-helper.js"></script>
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<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
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</head>
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<body>
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<main id=main>
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<div>
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<a id=link><img id="initial_image1" src="/images/lcp-256x256.png?1" style="width: 90vw; height: 90vh">
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<div id=extra></div>
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</a>
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</div>
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</main>
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<script>
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(async () => {
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const link = document.getElementById("link");
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// Inject a second image that takes a large part of the viewport.
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await new Promise(resolve => {
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requestAnimationFrame(() => requestAnimationFrame(() => {
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document.getElementById("extra").innerHTML = `
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<div style="position: absolute; bottom: 0; right: 0">
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<img id="initial_image2" src="/images/lcp-256x256.png?2" style="width: 90vw;height: 90vh">
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</div>`;
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resolve();
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}));
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});
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// Wait until the second image is rendered.
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await new Promise(resolve => {
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requestAnimationFrame(() => requestAnimationFrame(() => {
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resolve();
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}));
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});
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testSoftNavigation({
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addContent: async () => {
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// Remove the initial image, so that the text would be painted on screen.
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document.getElementById("initial_image1").remove();
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document.getElementById("initial_image2").remove();
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let lcp_element_painted;
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const lcp_element_paint_promise = new Promise((r) => { lcp_element_painted = r; });
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// Add an LCP element, but have it be small enough to not trigger the
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// Soft Navigation heuristics.
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const p = addTextParagraphToMain(
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"Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod",
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/*element_timing=*/"lcp");
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(new PerformanceObserver(list => {
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// Once the first element is fully painted:
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lcp_element_painted();
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})).observe({type: "element", buffered: true});
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await lcp_element_paint_promise;
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// Add a smaller element that gets us over that threshold.
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addTextParagraphToMain("dolore magna aliqua.");
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},
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link: link,
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test: "Test that an image LCP followed by a smaller soft navigation LCP"
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+ " properly queues an LCP entry, even when the soft navigation is"
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+ " detected after the LCP, even when initial paints significantly"
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+ " exceed the viewport dimensions."});
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})();
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</script>
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</body>
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</html>
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