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<!DOCTYPE html>
<meta charset=utf-8>
<title>The effect value of a keyframe effect: Property values that depend on
their context (target element)</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../../testcommon.js"></script>
<body>
<div id="log"></div>
<script>
'use strict';
test(t => {
const div = createDiv(t);
div.style.fontSize = '10px';
const animation = div.animate([ { marginLeft: '10em' },
{ marginLeft: '20em' } ], 1000);
animation.currentTime = 500;
assert_equals(getComputedStyle(div).marginLeft, '150px',
'Effect value before updating font-size');
div.style.fontSize = '20px';
assert_equals(getComputedStyle(div).marginLeft, '300px',
'Effect value after updating font-size');
}, 'Effect values reflect changes to font-size on element');
test(t => {
const parentDiv = createDiv(t);
const div = createDiv(t);
parentDiv.appendChild(div);
parentDiv.style.fontSize = '10px';
const animation = div.animate([ { marginLeft: '10em' },
{ marginLeft: '20em' } ], 1000);
animation.currentTime = 500;
assert_equals(getComputedStyle(div).marginLeft, '150px',
'Effect value before updating font-size on parent element');
parentDiv.style.fontSize = '20px';
assert_equals(getComputedStyle(div).marginLeft, '300px',
'Effect value after updating font-size on parent element');
}, 'Effect values reflect changes to font-size on parent element');
promise_test(t => {
const parentDiv = createDiv(t);
const div = createDiv(t);
parentDiv.appendChild(div);
parentDiv.style.fontSize = '10px';
const animation = div.animate([ { marginLeft: '10em' },
{ marginLeft: '20em' } ], 1000);
animation.pause();
animation.currentTime = 500;
parentDiv.style.fontSize = '20px';
return animation.ready.then(() => {
assert_equals(getComputedStyle(div).marginLeft, '300px',
'Effect value after updating font-size on parent element');
});
}, 'Effect values reflect changes to font-size when computed style is not'
+ ' immediately flushed');
promise_test(t => {
const divWith10pxFontSize = createDiv(t);
divWith10pxFontSize.style.fontSize = '10px';
const divWith20pxFontSize = createDiv(t);
divWith20pxFontSize.style.fontSize = '20px';
const div = createDiv(t);
div.remove(); // Detach
const animation = div.animate([ { marginLeft: '10em' },
{ marginLeft: '20em' } ], 1000);
animation.pause();
return animation.ready.then(() => {
animation.currentTime = 500;
divWith10pxFontSize.appendChild(div);
assert_equals(getComputedStyle(div).marginLeft, '150px',
'Effect value after attaching to font-size:10px parent');
divWith20pxFontSize.appendChild(div);
assert_equals(getComputedStyle(div).marginLeft, '300px',
'Effect value after attaching to font-size:20px parent');
});
}, 'Effect values reflect changes to font-size from reparenting');
test(t => {
const divA = createDiv(t);
divA.style.fontSize = '10px';
const divB = createDiv(t);
divB.style.fontSize = '20px';
const animation = divA.animate([ { marginLeft: '10em' },
{ marginLeft: '20em' } ], 1000);
animation.currentTime = 500;
assert_equals(getComputedStyle(divA).marginLeft, '150px',
'Effect value before updating target element');
animation.effect.target = divB;
assert_equals(getComputedStyle(divB).marginLeft, '300px',
'Effect value after updating target element');
}, 'Effect values reflect changes to target element');
</script>
</body>