40 lines
1.2 KiB
HTML
40 lines
1.2 KiB
HTML
<!DOCTYPE html>
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<title>Scaling with viewport units</title>
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<link rel="help" href="https://drafts.csswg.org/css-values-4/#viewport-relative-lengths">
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<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1860338">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<iframe id=iframe width=640 height=480></iframe>
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<script>
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const doc = iframe.contentDocument;
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const win = iframe.contentWindow;
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function test_computed_value(value, expected) {
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test((t) => {
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t.add_cleanup(() => { doc.body.innerHTML = ''; });
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doc.body.innerHTML = `
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<!doctype html>
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<style>
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* { margin: 0; }
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body { height: 100%; }
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div { height: ${value}; }
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</style>
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<div></div>
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`;
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let div = doc.querySelector('div');
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assert_equals(win.getComputedStyle(div).height, expected);
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}, `${value} computes to ${expected}`);
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}
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// Check the basic units are as expected
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test_computed_value('100vw', '640px');
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test_computed_value('100vh', '480px');
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// Try some calculations involving extreme scaling
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test_computed_value('calc((1vw - 6.3999px) * 10000000)', '1000px');
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test_computed_value('calc((100vh - 479px) * 60000)', '60000px');
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</script>
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