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177 lines
6.2 KiB
HTML
177 lines
6.2 KiB
HTML
<!doctype html>
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<meta charset=utf-8>
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<title>KeyframeEffect.setKeyframes() for CSS transitions</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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div.style.left = '0px';
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getComputedStyle(div).transitionProperty;
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div.style.transition = 'left 100s';
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div.style.left = '100px';
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const transition = div.getAnimations()[0];
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transition.effect.setKeyframes({ left: ['200px', '300px', '100px'] });
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assert_equals(getComputedStyle(div).left, '200px');
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}, 'Keyframes set using setKeyframes() are reflected in computed style for'
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+ ' a running transition');
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test(t => {
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const div = addDiv(t);
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div.style.left = '0px';
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getComputedStyle(div).transitionProperty;
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div.style.transition = 'left 100s';
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div.style.left = '100px';
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const transition = div.getAnimations()[0];
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transition.effect.setKeyframes({ top: ['0px', '100px', '300px'] });
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assert_equals(transition.transitionProperty, 'left');
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}, 'A transition with replaced keyframes still returns the original'
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+ ' transitionProperty');
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test(t => {
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const div = addDiv(t);
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div.style.left = '0px';
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getComputedStyle(div).transitionProperty;
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div.style.transition = 'left 100s';
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div.style.left = '100px';
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const transition = div.getAnimations()[0];
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transition.effect.setKeyframes({ });
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assert_equals(transition.transitionProperty, 'left');
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}, 'A transition with no keyframes still returns the original'
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+ ' transitionProperty');
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function retarget_test(description, newKeyframes, reversed_start) {
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test(t => {
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const div = addDiv(t);
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div.style.left = '0px';
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getComputedStyle(div).transitionProperty;
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div.style.transition = 'left 100s linear';
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div.style.left = '100px';
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const transition = div.getAnimations()[0];
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transition.currentTime = 50 * MS_PER_SEC;
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transition.effect.setKeyframes(newKeyframes);
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// Reverse transition
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div.style.left = '0px';
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const reversedTransition = div.getAnimations()[0];
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assert_approx_equals(
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reversedTransition.effect.getComputedTiming().activeDuration,
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50 * MS_PER_SEC, 1,
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"The reversed transition has correctly reduced duration"
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);
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assert_equals(reversedTransition.effect.getKeyframes()[0].left, reversed_start,
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"The reversed transition starts at the expected point");
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}, description);
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}
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retarget_test("A transition with replaced keyframes animating the same property " +
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"still exhibits normal reversing behavior.",
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{left: ['200px', '300px', '100px']}, '300px');
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retarget_test("A transition with replaced keyframes animating a different property " +
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"still exhibits normal reversing behavior (reversing from the base value).",
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{top: ['200px', '300px', '100px']}, '100px');
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retarget_test("A transition with replaced keyframes animating nothing " +
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"still exhibits normal reversing behavior (reversing from the base value).",
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{}, '100px');
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test(t => {
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const div = addDiv(t);
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// Initialize the style.
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div.style.left = '100px';
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div.style.top = '100px';
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div.style.transition = 'left 100s linear, top 100s linear';
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getComputedStyle(div).left;
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// Start some transitions.
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div.style.left ='200px';
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div.style.top = '200px';
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const transitions = div.getAnimations();
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// Hand control of the left property over to top's transition. The composite
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// ordering of the animations is 'left' then 'top' since the transitions were
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// generated in the same transition generation and follow Unicode ordering.
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assert_equals(transitions[0].transitionProperty, 'left');
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transitions[0].effect.setKeyframes({});
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transitions[1].effect.setKeyframes([
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{left: '100px', top: '100px'},
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{left: '400px', top: '200px'}])
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getComputedStyle(div).left;
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// These updates form a single style change, equivalent to setting times and
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// then setting left.
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transitions[0].currentTime = 50 * MS_PER_SEC;
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div.style.left ='100px';
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transitions[1].currentTime = 60 * MS_PER_SEC;
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// As there was a style change event, the new 'left' transition now has a
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// higher value for the transition generation than the 'top' transition,
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// reversing the order of the transitions returned by getAnimations.
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const reversedTransition = div.getAnimations()[1];
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assert_equals(reversedTransition.transitionProperty, 'left',
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"A reversed transition on left is produced");
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assert_approx_equals(
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reversedTransition.effect.getComputedTiming().activeDuration,
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50 * MS_PER_SEC, 1,
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"The reversed transition has correctly reduced duration (based on the " +
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"original left transition).");
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assert_equals(reversedTransition.effect.getKeyframes()[0].left, '280px',
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"The reversed transition gets its start value from the other " +
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"transition controlling left");
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}, "A transition with replaced keyframes animating nothing on a property " +
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"being controlled by another modified transition exhibits normal " +
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"reversing behavior and reverses from the other transition's current " +
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"value.");
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test(t => {
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const div = addDiv(t);
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// Initialize the style.
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div.style.left = '100px';
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div.style.transition = 'left 100s linear';
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getComputedStyle(div).left;
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// Start the transtion.
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div.style.left ='200px';
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const transition = div.getAnimations()[0];
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// Update the keyframes and advance to the midpoint of the animation.
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transition.effect.setKeyframes([
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{ offset: 0, left: '-50px', composite: 'add', easing: 'linear'}]);
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transition.currentTime = 50 * MS_PER_SEC;
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assert_equals(getComputedStyle(div).left, '175px',
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'The computed style is based on the updated keyframes');
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div.style.left = '100px';
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const reversedTransition = div.getAnimations()[0];
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assert_equals(reversedTransition.effect.getKeyframes()[0].left, '175px',
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'The start value matches the \'before change\' value');
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}, 'A transition with replaced kefyrames and composite \'add\' exhibits ' +
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'normal reversing behavior, and the effect is not double counted when ' +
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'calculating the before change style');
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</script>
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