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<!DOCTYPE html>
<meta charset=utf-8>
<title>KeyframeEffect.target and .pseudoElement</title>
<link rel="help"
href="https://drafts.csswg.org/web-animations/#dom-keyframeeffect-target">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../../testcommon.js"></script>
<style>
.before::before {content: 'foo'; display: inline-block;}
.after::after {content: 'bar'; display: inline-block;}
.pseudoa::before, .pseudoc::before {margin-left: 10px;}
.pseudob::before, .pseudoc::after {margin-left: 20px;}
</style>
<body>
<div id="log"></div>
<script>
'use strict';
const gKeyFrames = { 'marginLeft': ['0px', '100px'] };
test(t => {
const div = createDiv(t);
const effect = new KeyframeEffect(null, gKeyFrames, 100 * MS_PER_SEC);
effect.target = div;
const anim = new Animation(effect, document.timeline);
anim.play();
anim.currentTime = 50 * MS_PER_SEC;
assert_equals(getComputedStyle(div).marginLeft, '50px',
'Value at 50% progress');
}, 'Test setting target before constructing the associated animation');
test(t => {
const div = createDiv(t);
div.style.marginLeft = '10px';
const effect = new KeyframeEffect(null, gKeyFrames, 100 * MS_PER_SEC);
const anim = new Animation(effect, document.timeline);
anim.play();
anim.currentTime = 50 * MS_PER_SEC;
assert_equals(getComputedStyle(div).marginLeft, '10px',
'Value at 50% progress before setting new target');
effect.target = div;
assert_equals(getComputedStyle(div).marginLeft, '50px',
'Value at 50% progress after setting new target');
}, 'Test setting target from null to a valid target');
test(t => {
const div = createDiv(t);
div.style.marginLeft = '10px';
const anim = div.animate(gKeyFrames, 100 * MS_PER_SEC);
anim.currentTime = 50 * MS_PER_SEC;
assert_equals(getComputedStyle(div).marginLeft, '50px',
'Value at 50% progress before clearing the target')
anim.effect.target = null;
assert_equals(getComputedStyle(div).marginLeft, '10px',
'Value after clearing the target')
}, 'Test setting target from a valid target to null');
test(t => {
const a = createDiv(t);
const b = createDiv(t);
a.style.marginLeft = '10px';
b.style.marginLeft = '20px';
const anim = a.animate(gKeyFrames, 100 * MS_PER_SEC);
anim.currentTime = 50 * MS_PER_SEC;
assert_equals(getComputedStyle(a).marginLeft, '50px',
'Value of 1st element (currently targeted) before ' +
'changing the effect target');
assert_equals(getComputedStyle(b).marginLeft, '20px',
'Value of 2nd element (currently not targeted) before ' +
'changing the effect target');
anim.effect.target = b;
assert_equals(getComputedStyle(a).marginLeft, '10px',
'Value of 1st element (currently not targeted) after ' +
'changing the effect target');
assert_equals(getComputedStyle(b).marginLeft, '50px',
'Value of 2nd element (currently targeted) after ' +
'changing the effect target');
// This makes sure the animation property is changed correctly on new
// targeted element.
anim.currentTime = 75 * MS_PER_SEC;
assert_equals(getComputedStyle(b).marginLeft, '75px',
'Value of 2nd target (currently targeted) after ' +
'changing the animation current time.');
}, 'Test setting target from a valid target to another target');
promise_test(async t => {
const animation = createDiv(t).animate(
{ opacity: 0 },
{ duration: 1, fill: 'forwards' }
);
const foreignElement
= document.createElementNS('http://example.org/test', 'test');
document.body.appendChild(foreignElement);
t.add_cleanup(() => {
foreignElement.remove();
});
animation.effect.target = foreignElement;
// Wait a frame to make sure nothing bad happens when the UA tries to update
// style.
await waitForNextFrame();
}, 'Target element can be set to a foreign element');
// Pseudo-element tests
// (testing target and pseudoElement in these cases)
// Since blink uses separate code paths for handling pseudo-element styles
// depending on whether content is set (putting the pseudo-element in the layout),
// we run tests on both cases.
for (const hasContent of [true, false]){
test(t => {
const d = createDiv(t);
d.classList.add('pseudoa');
if (hasContent) {
d.classList.add('before');
}
const effect = new KeyframeEffect(null, gKeyFrames, 100 * MS_PER_SEC);
const anim = new Animation(effect, document.timeline);
anim.play();
anim.currentTime = 50 * MS_PER_SEC;
assert_equals(getComputedStyle(d, '::before').marginLeft, '10px',
'Value at 50% progress before setting new target');
effect.target = d;
effect.pseudoElement = '::before';
assert_equals(effect.target, d, "Target element is set correctly");
assert_equals(effect.pseudoElement, '::before', "Target pseudo-element set correctly");
assert_equals(getComputedStyle(d, '::before').marginLeft, '50px',
'Value at 50% progress after setting new target');
}, "Change target from null to " + (hasContent ? "an existing" : "a non-existing") +
" pseudoElement setting target first.");
test(t => {
const d = createDiv(t);
d.classList.add('pseudoa');
if (hasContent) {
d.classList.add('before');
}
const effect = new KeyframeEffect(null, gKeyFrames, 100 * MS_PER_SEC);
const anim = new Animation(effect, document.timeline);
anim.play();
anim.currentTime = 50 * MS_PER_SEC;
assert_equals(getComputedStyle(d, '::before').marginLeft, '10px',
'Value at 50% progress before setting new target');
effect.pseudoElement = '::before';
effect.target = d;
assert_equals(effect.target, d, "Target element is set correctly");
assert_equals(effect.pseudoElement, '::before', "Target pseudo-element set correctly");
assert_equals(getComputedStyle(d, '::before').marginLeft, '50px',
'Value at 50% progress after setting new target');
}, "Change target from null to " + (hasContent ? "an existing" : "a non-existing") +
" pseudoElement setting pseudoElement first.");
test(t => {
const d = createDiv(t);
d.classList.add('pseudoa');
if (hasContent) {
d.classList.add('before');
}
const anim = d.animate(gKeyFrames, {duration: 100 * MS_PER_SEC, pseudoElement: '::before'});
anim.currentTime = 50 * MS_PER_SEC;
anim.effect.pseudoElement = null;
assert_equals(anim.effect.target, d,
"Animation targets specified element (target element)");
assert_equals(anim.effect.pseudoElement, null,
"Animation targets specified element (null pseudo-selector)");
assert_equals(getComputedStyle(d, '::before').marginLeft, '10px',
'Value of 1st element (currently not targeted) after ' +
'changing the effect target');
assert_equals(getComputedStyle(d).marginLeft, '50px',
'Value of 2nd element (currently targeted) after ' +
'changing the effect target');
}, "Change target from " + (hasContent ? "an existing" : "a non-existing") + " pseudo-element to the originating element.");
for (const prevHasContent of [true, false]) {
test(t => {
const a = createDiv(t);
a.classList.add('pseudoa');
const b = createDiv(t);
b.classList.add('pseudob');
if (prevHasContent) {
a.classList.add('before');
}
if (hasContent) {
b.classList.add('before');
}
const anim = a.animate(gKeyFrames, {duration: 100 * MS_PER_SEC, pseudoElement: '::before'});
anim.currentTime = 50 * MS_PER_SEC;
anim.effect.target = b;
assert_equals(anim.effect.target, b,
"Animation targets specified pseudo-element (target element)");
assert_equals(anim.effect.pseudoElement, '::before',
"Animation targets specified pseudo-element (pseudo-selector)");
assert_equals(getComputedStyle(a, '::before').marginLeft, '10px',
'Value of 1st element (currently not targeted) after ' +
'changing the effect target');
assert_equals(getComputedStyle(b, '::before').marginLeft, '50px',
'Value of 2nd element (currently targeted) after ' +
'changing the effect target');
}, "Change target from " + (prevHasContent ? "an existing" : "a non-existing") +
" to a different " + (hasContent ? "existing" : "non-existing") +
" pseudo-element by setting target.");
test(t => {
const d = createDiv(t);
d.classList.add('pseudoc');
if (prevHasContent) {
d.classList.add('before');
}
if (hasContent) {
d.classList.add('after');
}
const anim = d.animate(gKeyFrames, {duration: 100 * MS_PER_SEC, pseudoElement: '::before'});
anim.currentTime = 50 * MS_PER_SEC;
anim.effect.pseudoElement = '::after';
assert_equals(anim.effect.target, d,
"Animation targets specified pseudo-element (target element)");
assert_equals(anim.effect.pseudoElement, '::after',
"Animation targets specified pseudo-element (pseudo-selector)");
assert_equals(getComputedStyle(d, '::before').marginLeft, '10px',
'Value of 1st element (currently not targeted) after ' +
'changing the effect target');
assert_equals(getComputedStyle(d, '::after').marginLeft, '50px',
'Value of 2nd element (currently targeted) after ' +
'changing the effect target');
}, "Change target from " + (prevHasContent ? "an existing" : "a non-existing") +
" to a different " + (hasContent ? "existing" : "non-existing") +
" pseudo-element by setting pseudoElement.");
}
}
for (const pseudo of [
'',
'before',
':abc',
'::abc',
]) {
test(t => {
const effect = new KeyframeEffect(null, gKeyFrames, 100 * MS_PER_SEC);
assert_throws_dom("SyntaxError", () => effect.pseudoElement = pseudo );
}, `Changing pseudoElement to a non-null invalid pseudo-selector ` +
`'${pseudo}' throws a SyntaxError`);
}
test(t => {
const effect = new KeyframeEffect(null, gKeyFrames, 100 * MS_PER_SEC);
effect.pseudoElement = '::placeHOLDER';
assert_equals(effect.pseudoElement, '::placeholder');
}, `Changing pseudoElement to ::placeHOLDER works`);
</script>
</body>
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