<!doctype html>
<meta charset=utf-8>
<title>CSSTransition.finished</title>
<!--  TODO: Add a more specific link for this once it is specified.  -->
<link rel="help" href="https://drafts.csswg.org/css-transitions-2/#csstransition">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/helper.js"></script>
<style>

.animated-div {
  margin-left: 100px;
  transition: margin-left 100s linear 100s;
}

</style>
<div id="log"></div>
<script>

'use strict';

promise_test(async t => {
  const div = addDiv(t, { class: 'animated-div' });
  getComputedStyle(div).marginLeft;
  div.style.marginLeft = '200px';
  const animation = div.getAnimations()[0];

  animation.finish();
  await animation.finished;

  animation.play();
  const marginLeft = parseFloat(getComputedStyle(div).marginLeft);
  assert_equals(
    marginLeft,
    100,
    'Replaying a finished transition should update the target element\'s style'
  );
}, 'Restarting a finished transition rewinds playback');

</script>