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<!DOCTYPE html>
<title>Viewport units in @keyframes</title>
<link rel="help" href="https://drafts.csswg.org/css-values-4/#viewport-relative-lengths">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
iframe {
width: 200px;
height: 100px;
}
</style>
<iframe id=iframe></iframe>
<script>
const doc = iframe.contentDocument;
const win = iframe.contentWindow;
function test_interpolated_value(from, to, expected) {
test((t) => {
t.add_cleanup(() => { doc.body.innerHTML = ''; });
doc.body.innerHTML = `
<style>
@keyframes anim {
from { height: ${from}; }
to { height: ${to}}
}
div { animation: anim linear 10s -5s paused; }
</style>
<div></div>
`;
let div = doc.querySelector('div');
assert_equals(win.getComputedStyle(div).height, expected);
}, `Interpolation from ${from} to ${to} is ${expected} at 50%`);
}
// Flush the iframe styles before starting tests to avoid the animation in the
// iframe starts before the iframe's document gets sized as expected.
iframe.getBoundingClientRect();
test_interpolated_value('0px', '100vw', '100px');
test_interpolated_value('0px', '100vi', '100px');
test_interpolated_value('0px', '100vmax', '100px');
test_interpolated_value('0px', '100svw', '100px');
test_interpolated_value('0px', '100svi', '100px');
test_interpolated_value('0px', '100svmax', '100px');
test_interpolated_value('0px', '100lvw', '100px');
test_interpolated_value('0px', '100lvi', '100px');
test_interpolated_value('0px', '100lvmax', '100px');
test_interpolated_value('0px', '100dvw', '100px');
test_interpolated_value('0px', '100dvi', '100px');
test_interpolated_value('0px', '100dvmax', '100px');
test_interpolated_value('0px', '100vh', '50px');
test_interpolated_value('0px', '100vb', '50px');
test_interpolated_value('0px', '100vmin', '50px');
test_interpolated_value('0px', '100svh', '50px');
test_interpolated_value('0px', '100svb', '50px');
test_interpolated_value('0px', '100svmin', '50px');
test_interpolated_value('0px', '100lvh', '50px');
test_interpolated_value('0px', '100lvb', '50px');
test_interpolated_value('0px', '100lvmin', '50px');
test_interpolated_value('0px', '100dvh', '50px');
test_interpolated_value('0px', '100dvb', '50px');
test_interpolated_value('0px', '100dvmin', '50px');
</script>
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