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69 lines
2.1 KiB
HTML
69 lines
2.1 KiB
HTML
<!doctype html>
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<meta charset=utf-8>
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<title>CSSAnimation.startTime</title>
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<!-- TODO: Add a more specific link for this once it is specified. -->
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<link rel="help" href="https://drafts.csswg.org/css-animations-2/#cssanimation">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="support/testcommon.js"></script>
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<style>
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.animated-div {
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margin-left: 10px;
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/* Make it easier to calculate expected values: */
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animation-timing-function: linear ! important;
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}
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@keyframes anim {
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from { margin-left: 100px; }
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to { margin-left: 200px; }
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}
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</style>
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<div id="log"></div>
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<script type="text/javascript">
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'use strict';
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test(t => {
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const div = addDiv(t, { 'class': 'animated-div' });
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div.style.animation = 'anim 100s 100s';
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const animation = div.getAnimations()[0];
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const timelineTime = animation.timeline.currentTime;
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animation.startTime = timelineTime;
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assert_times_equal(animation.startTime, timelineTime,
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'Check setting of startTime actually works');
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}, 'The start time of a CSS animation can be set');
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promise_test(async t => {
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const div = addDiv(t, { 'class': 'animated-div' });
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div.style.animation = 'anim 100s 100s';
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const animation = div.getAnimations()[0];
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// Seek to the half-way point
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animation.startTime = animation.timeline.currentTime - 150 * MS_PER_SEC;
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assert_equals(getComputedStyle(div).marginLeft, '150px');
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}, 'The start time can be set to seek a CSS animation');
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promise_test(async t => {
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const div = addDiv(t, { class: 'animated-div' });
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const eventWatcher = new EventWatcher(t, div, [
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'animationstart',
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'animationend',
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]);
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div.style.animation = 'anim 100s 100s';
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const animation = div.getAnimations()[0];
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await animation.ready;
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animation.startTime = animation.timeline.currentTime - 100 * MS_PER_SEC;
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await eventWatcher.wait_for('animationstart');
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animation.startTime = animation.timeline.currentTime - 200 * MS_PER_SEC;
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await eventWatcher.wait_for('animationend');
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}, 'Seeking a CSS animation using the start time dispatches animation events');
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</script>
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