50 lines
1.5 KiB
HTML
50 lines
1.5 KiB
HTML
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<!DOCTYPE html>
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<html class="reftest-wait">
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<meta charset="UTF-8">
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<title>reverse running animation</title>
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<link rel="match" href="reverse-running-animation-ref.html">
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<script src="/common/reftest-wait.js"></script>
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<script src="../../testcommon.js"></script>
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<style>
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#box {
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background: green;
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height: 40px;
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width: 40px;
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}
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</style>
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<body>
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<div id="box"></div>
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<p id="notes">
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This test animates the box color from green to red and reverses the play
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direction shortly after the midpoint. If the box remains red, the test
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failed.
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</p>
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</body>
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<script>
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onload = async function() {
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const box = document.getElementById('box');
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const duration = 10000;
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const anim =
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box.animate({ background: [ 'green', 'red' ] },
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{ duration: duration, easing: 'steps(2, jump-none)' });
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anim.currentTime = duration / 2;
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anim.ready.then(() => {
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const startTime = anim.timeline.currentTime;
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waitForAnimationFrames(2).then(() => {
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anim.reverse();
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anim.ready.then(() => {
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const reversalTime = anim.timeline.currentTime;
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const forwardPlayingTime = reversalTime - startTime;
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const checkIfDone = () => {
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if (anim.timeline.currentTime - reversalTime > forwardPlayingTime)
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takeScreenshot();
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else
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requestAnimationFrame(checkIfDone);
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};
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requestAnimationFrame(checkIfDone);
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});
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});
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});
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};
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</script>
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