viewport-units-keyframes.html

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This WPT test may be referenced by the following Test IDs:
- /css/css-values/viewport-units-keyframes.html - WPT Dashboard Interop Dashboard

<!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>