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<!doctype html>
<html class="reftest-wait reftest-no-flush">
<head>
<meta charset=utf-8>
<title>Check for animation restyling on an element's initial restyling after leaving a display:none subtree</title>
<style>
#target {
width: 0px;
height: 100px;
background: green;
display: none;
}
</style>
</head>
<body>
<div id="target"></div>
<script>
// Wait for a steady state before beginning so that style flushes from the
// initial restyling don't interfere with the results.
document.addEventListener('MozReftestInvalidate', () => {
requestAnimationFrame(() => {
// Get target element -- computed style should be display: none by now.
const target = document.getElementById('target');
// Update specified style but don't flush
target.style.display = 'block';
// Trigger an animation on the element.
//
// animate() won't flush styles so we are testing that it still correctly
// marks the element as needing an animation restyle even when it doesn't have
// style data.
target.animate(
{ width: ['0px', '100px'] },
{ duration: 100 * 1000, easing: 'step-start' }
);
document.documentElement.classList.remove('reftest-wait');
});
});
</script>
</body>
</html>
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