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124 lines
3.6 KiB
HTML
124 lines
3.6 KiB
HTML
<!doctype html>
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<meta charset=utf-8>
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<title>CSSTransition.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-transitions-2/#csstransition">
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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/helper.js"></script>
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<div id="log"></div>
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<script>
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'use strict';
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test(t => {
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const div = addDiv(t, {
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style: 'margin-left: 100px; transition: margin-left 100s linear 100s',
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});
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getComputedStyle(div).marginLeft;
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div.style.marginLeft = '200px';
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const animation = div.getAnimations()[0];
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assert_equals(animation.startTime, null, 'startTime is unresolved');
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}, 'The start time of a newly-created transition is unresolved');
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promise_test(async t => {
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const div = addDiv(t);
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div.style.left = '0px';
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div.style.top = '0px';
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getComputedStyle(div).transitionProperty;
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div.style.transition = 'all 100s';
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div.style.left = '100px';
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div.style.top = '100px';
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let animations = div.getAnimations();
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assert_equals(animations.length, 2);
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await waitForAllAnimations(animations);
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assert_equals(animations[0].startTime, animations[1].startTime,
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'CSS transitions started together have the same start time');
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await waitForAnimationFrames(1);
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div.style.backgroundColor = 'green';
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animations = div.getAnimations();
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assert_equals(animations.length, 3);
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await waitForAllAnimations(animations);
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assert_less_than(animations[1].startTime, animations[2].startTime,
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'A CSS transition added in a later frame has a later start time');
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}, 'The start time of transitions is based on when they are generated');
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test(t => {
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const div = addDiv(t, {
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style: 'margin-left: 100px; transition: margin-left 100s linear 100s',
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});
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getComputedStyle(div).marginLeft;
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div.style.marginLeft = '200px';
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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(
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animation.startTime,
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timelineTime,
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'Check setting of startTime actually works'
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);
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}, 'The start time of a transition can be set');
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promise_test(async t => {
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const div = addDiv(t, {
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style: 'margin-left: 100px; transition: margin-left 100s linear 100s',
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});
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getComputedStyle(div).marginLeft;
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div.style.marginLeft = '200px';
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const animation = div.getAnimations()[0];
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await animation.ready;
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const timelineTime = animation.timeline.currentTime;
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const marginLeft = () => parseFloat(getComputedStyle(div).marginLeft);
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animation.startTime = timelineTime - 100 * MS_PER_SEC;
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assert_equals(marginLeft(), 100);
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animation.startTime = timelineTime - 150 * MS_PER_SEC;
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assert_equals(marginLeft(), 150);
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}, 'The start time can be set to seek a transition');
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promise_test(async t => {
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const div = addDiv(t, {
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style: 'margin-left: 100px; transition: margin-left 100s linear 100s',
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});
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const eventWatcher = new EventWatcher(t, div, [
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'transitionstart',
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'transitionend',
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]);
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getComputedStyle(div).marginLeft;
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div.style.marginLeft = '200px';
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const animation = div.getAnimations()[0];
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await animation.ready;
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const timelineTime = animation.timeline.currentTime;
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animation.startTime = timelineTime - 100 * MS_PER_SEC;
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await frameTimeout(
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eventWatcher.wait_for('transitionstart'),
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2,
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'transitionstart'
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);
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animation.startTime = timelineTime - 200 * MS_PER_SEC;
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await frameTimeout(
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eventWatcher.wait_for('transitionend'),
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2,
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'transitionend'
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);
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}, 'Seeking a transition using start time dispatches transition events');
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</script>
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