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169 lines
4.1 KiB
HTML
169 lines
4.1 KiB
HTML
<!doctype html>
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<meta charset=utf-8>
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<title>KeyframeEffect.getKeyframes() 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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<style>
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:root {
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--var-100px: 100px;
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}
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</style>
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<div id="log"></div>
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<script>
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'use strict';
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const getKeyframes = e => {
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return e.getAnimations()[0].effect.getKeyframes();
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};
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const assert_frames_equal = (a, b, name) => {
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assert_equals(
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Object.keys(a).sort().toString(),
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Object.keys(b).sort().toString(),
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`properties on ${name}`
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);
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for (const p in a) {
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assert_equals(a[p], b[p], `value for '${p}' on ${name}`);
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}
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};
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test(t => {
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const div = addDiv(t);
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div.style.left = '0px';
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getComputedStyle(div).transitionProperty;
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div.style.transition = 'left 100s';
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div.style.left = '100px';
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const frames = getKeyframes(div);
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assert_equals(frames.length, 2, 'number of frames');
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const expected = [
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{ offset: 0,
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computedOffset: 0,
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easing: 'linear',
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composite: 'auto',
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left: '0px',
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},
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{
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offset: 1,
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computedOffset: 1,
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easing: 'linear',
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composite: 'auto',
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left: '100px',
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},
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];
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for (let i = 0; i < frames.length; i++) {
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assert_frames_equal(frames[i], expected[i], `ComputedKeyframe #${i}`);
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}
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}, 'KeyframeEffect.getKeyframes() returns expected frames for a simple'
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+ ' 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 steps(2,end)';
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div.style.left = '100px';
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const frames = getKeyframes(div);
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assert_equals(frames.length, 2, 'number of frames');
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const expected = [
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{
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offset: 0,
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computedOffset: 0,
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easing: 'linear',
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composite: 'auto',
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left: '0px',
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},
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{
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offset: 1,
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computedOffset: 1,
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easing: 'linear',
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composite: 'auto',
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left: '100px',
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},
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];
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for (let i = 0; i < frames.length; i++) {
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assert_frames_equal(frames[i], expected[i], `ComputedKeyframe #${i}`);
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}
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}, 'KeyframeEffect.getKeyframes() returns frames unaffected by a non-default easing function');
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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 = 'var(--var-100px)';
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const frames = getKeyframes(div);
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// CSS transition endpoints are based on the computed value so we
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// shouldn't see the variable reference
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const expected = [
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{
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offset: 0,
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computedOffset: 0,
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easing: 'linear',
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composite: 'auto',
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left: '0px',
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},
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{
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offset: 1,
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computedOffset: 1,
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easing: 'linear',
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composite: 'auto',
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left: '100px',
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},
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];
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for (let i = 0; i < frames.length; i++) {
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assert_frames_equal(frames[i], expected[i], `ComputedKeyframe #${i}`);
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}
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}, 'KeyframeEffect.getKeyframes() returns expected frames for a'
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+ ' transition with a CSS variable endpoint');
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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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// Resetting the effect target before retrieving the keyframes should not
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// affect the computed property values.
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const anim = div.getAnimations()[0];
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anim.effect.target = null;
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const frames = anim.effect.getKeyframes();
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const expected = [
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{
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offset: 0,
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computedOffset: 0,
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easing: 'linear',
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composite: 'auto',
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left: '0px',
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},
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{
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offset: 1,
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computedOffset: 1,
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easing: 'linear',
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composite: 'auto',
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left: '100px',
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},
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];
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for (let i = 0; i < frames.length; i++) {
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assert_frames_equal(frames[i], expected[i], `ComputedKeyframe #${i}`);
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}
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}, 'KeyframeEffect.getKeyframes() returns expected frames for a'
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+ ' transition after resetting the effect target');
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</script>
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