File: keyframes-allowed-properties.html

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<!DOCTYPE html>
<title>Tests which properties are allowed in @keyframes</title>
<link rel="help" href="https://drafts.csswg.org/css-animations/#typedef-keyframe-block">
<link rel="author" href="mailto:xiaochengh@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style id=sheet>
@keyframes foo {
  from {
    /* Non-animation properties are allowed */
    margin-top: 10px;
    /* animation-timing-function is specially allowed */
    animation-timing-function: ease;
    /* All other animation properties are not allowed */
    animation-name: none;
    animation-duration: 1s;
    animation-iteration-count: 1;
    animation-direction: normal;
    animation-play-state: running;
    animation-delay: 0s;
    animation-fill-mode: none;
    /* The animation shorthand is also not allowed */
    animation: bar 1s infinite;
  }
}
</style>
<script>
test(() => {
  const keyframe = sheet.sheet.cssRules[0].cssRules[0];
  const style = keyframe.style;
  assert_equals(style.length, 2);
  assert_equals(style.marginTop, '10px');
  assert_equals(style.animationTimingFunction, 'ease');
}, '@keyframes allows all non-animation properties and animation-timing-function');
</script>