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- This WPT test may be referenced by the following Test IDs:
            
- /css/css-transitions/transition-after-animation-001.html - WPT Dashboard Interop Dashboard
 
 
<!DOCTYPE html>
<title>Starting transition after animation has ended</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="./support/helper.js"></script>
<style>
  @keyframes anim {
    from { left: 100px }
    to { left: 200px }
  }
  #div {
    left: 0px;
    position: relative;
    width: 50px;
    height: 50px;
    background-color: green;
  }
  #div.animate {
    animation: anim 0.1s linear;
  }
  #div.transition {
    left: 300px;
    transition: left 1000s steps(2, start);
  }
</style>
<div id=div>
</div>
<script>
promise_test(async t => {
    const watcher = new EventWatcher(t, div, ['animationend']);
    assert_equals(getComputedStyle(div).left, '0px');
    div.classList.toggle('animate');
    assert_equals(getComputedStyle(div).left, '100px');
    await watcher.wait_for('animationend');
    assert_equals(getComputedStyle(div).left, '0px');
    div.classList.toggle('transition');
    assert_equals(getComputedStyle(div).left, '150px');
}, 'Starting transition after animation has ended');
</script>