34 lines
1.1 KiB
HTML
34 lines
1.1 KiB
HTML
<!DOCTYPE html>
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<meta charset="utf-8">
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<meta http-equiv="Delegate-CH" content="Sec-CH-Width">
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<title>Tests Sec-CH-Width with auto sizes</title>
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<link rel="help" href="https://wicg.github.io/responsive-image-client-hints/#sec-ch-width">
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<link rel="help" href="https://html.spec.whatwg.org/#sizes-attributes">
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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>
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setup({explicit_done: true});
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function run() {
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test(() => {
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const testImage = document.getElementsByTagName('img')[0];
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// Spec: sec-ch-width MUST be an integer greater than or equal to 0.
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const width = Math.ceil(50 * devicePixelRatio);
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assert_equals(testImage.naturalWidth, 2 * width);
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assert_equals(testImage.naturalHeight, 3 * width);
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}, 'Sec-CH-Width is set for lazy auto sizes');
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done();
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}
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</script>
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<div style="width: 100px; height: 100px;">
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<img
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onload="run()"
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loading="lazy"
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sizes="auto"
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srcset="resources/2x3-svg-scaled-by-sec-ch-width.py 50w"
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width="300"
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height="300"
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style="width: 50%; height: 50%;">
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</div>
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