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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>move after transition</title>
<link rel="help" href="https://drafts.csswg.org/css-transitions/#transition-property-property">
<style>
#container {
position: relative;
width: 400px;
height: 100px;
border: 1px solid black;
}
#box {
position: absolute;
width: 100px;
height: 100px;
background-color: green;
transform-style: preserve-3d;
transition: transform 300ms linear;
transform: translateX(0);
}
#container.moved #box {
transform: translateX(300px);
}
</style>
</head>
<body>
<div id="container">
<div id="box"></div>
</div>
</body>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/css/css-transitions/support/helper.js"></script>
<script type="text/javascript">
promise_test(async t => {
const container = document.getElementById('container');
const box = document.getElementById('box');
await waitForAnimationFrames(2);
container.classList.add('moved');
const animations = document.getAnimations();
assert_equals(animations.length, 1);
assert_equals(getComputedStyle(box).transform,
"matrix(1, 0, 0, 1, 0, 0)");
animations[0].finish();
assert_equals(getComputedStyle(box).transform,
"matrix(1, 0, 0, 1, 300, 0)");
// Verify that we do not create a second transform transition.
box.style.transitionProperty = 'none';
box.style.transform = 'translateX(150px)';
assert_equals(box.getAnimations().length, 0);
assert_equals(getComputedStyle(box).transform,
"matrix(1, 0, 0, 1, 150, 0)");
}, 'Move after transition.');
</script>
</html>
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