54 lines
1.8 KiB
HTML
54 lines
1.8 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="resources/soft-navigation-helper.js"></script>
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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 src="/images/lcp-256x256.png" id="img"></a>
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</div>
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</main>
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<script>
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const link = document.getElementById("link");
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let first_lcp_painted;
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let second_lcp_painted;
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(async () => {
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await new Promise(r => { first_lcp_painted = r; });
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addImageToMain("lcp-133x106.png", "no_lcp");
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(new PerformanceObserver(second_lcp_painted)).observe({type: "element"});
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})();
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testSoftNavigation({
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pushState: null,
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addContent: async () => {
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// Add an LCP element.
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await new Promise(resolve => {
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addImageToMain("lcp-100x50.png", "first_lcp");
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(new PerformanceObserver(resolve)).observe({type: "element"});
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});
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first_lcp_painted();
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// Wait for the unrelated LCP to be painted.
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await new Promise(r => { second_lcp_painted = r; });
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const url = URL + "?" + counter;
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history.pushState({}, '', url);
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},
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link: link,
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validate: async () => {
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const lcps = await getLcpEntries();
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assert_equals(lcps.length, 2, "Got 2 LCP entries");
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assert_equals(lcps[lcps.length - 1].id, "first_lcp", "Got the first LCP");
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},
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test: "Image LCP discovered between user interaction and soft " +
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"navigation detection are properly reported, while unrelated " +
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"LCPs are ignored during that time. As a side effect, we also " +
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"test element timing."});
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</script>
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</body>
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</html>
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