named-range-keyframes-with-document-timeline.tentative.html

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This WPT test may be referenced by the following Test IDs:
- /scroll-animations/css/named-range-keyframes-with-document-timeline.tentative.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

<meta charset="utf-8">

<title>Named range keyframe offset when you have a document timeline</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/web-animations/testcommon.js"></script>

<script src="support/testcommon.js"></script>

<style>

  @keyframes fade-in-animation {

    from { opacity: 0 }

    enter 0% { opacity: 0 }

    enter 100% { opacity: 1 }

    exit 0% { opacity: 1 }

    exit 100% { opacity: 0 }

    to { opacity: 1 }

  #subject {

    background-color: blue;

    height: 200px;

    width: 200px;

    animation: linear both fade-in-animation;

    animation-duration: 0.1s;

    animation-play-state: paused;

</style>

<body onload="runTests()">

  <div id="subject"></div>

</body>

<script type="text/javascript">

  setup(assert_implements_animation_timeline);

  function runTests() {

    promise_test(async t => {

      const anim = subject.getAnimations()[0];

      anim.currentTime = -1;

      assert_equals(getComputedStyle(subject).opacity, "0",

              'unexpected value in the before phase');

      anim.currentTime = 50;

      assert_equals(getComputedStyle(subject).opacity, "0.5",

              'unexpected value in the middle of the animation');

      anim.currentTime = 100;

      assert_equals(getComputedStyle(subject).opacity, "1",

              'unexpected value in the after phase');

});

</script>

</html>