44 lines
1.1 KiB
HTML
44 lines
1.1 KiB
HTML
<!DOCTYPE html>
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<head>
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<title>Performance Paint Timing Test: FCP should fire for background image only when visible</title>
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<style>
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#main {
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width: 100px;
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height: 100px;
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}
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/* contentful and preFCP classes are defined in test_fcp script. */
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#main.preFCP {
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visibility: hidden;
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}
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#main.contentful, #main.preFCP {
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background-image: url(../resources/circles.png);
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}
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#main.contentful {
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visibility: visible;
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}
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</style>
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</head>
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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/utils.js"></script>
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<div id="main"></div>
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<script>
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// Load the image into memory first to make sure it's decoded.
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function load_image() {
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const img = document.createElement("img");
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img.src = "../resources/circles.png";
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return new Promise(resolve => {
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img.onload = async () => resolve();
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});
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}
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test_fcp("First contentful paint fires for background image only when visible.", load_image);
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</script>
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</body>
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</html>
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