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57 lines
1.5 KiB
HTML
57 lines
1.5 KiB
HTML
<!doctype html>
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<html>
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<head>
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<meta charset=utf-8>
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<title>CSS Transitions Test: Transitions do not run for a pseudo-element that is not being rendered</title>
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<link rel="help" title="Starting transitions"
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href="https://drafts.csswg.org/css-transitions/#starting">
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<script src="/resources/testharness.js" type="text/javascript"></script>
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<script src="/resources/testharnessreport.js" type="text/javascript"></script>
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<script src="./support/helper.js" type="text/javascript"></script>
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</head>
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<body>
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<div id="log"></div>
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<script>
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promise_test(async t => {
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for (const pseudoType of ['before', 'after']) {
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const style = addStyle(t, {
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[`.init::${pseudoType}`]: 'content: ""; width: 0px; transition: width 100s;',
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[`.change::${pseudoType}`]: 'width: 100px;',
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[`.cancel::${pseudoType}`]: 'content: none',
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});
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// Create element (and pseudo-element) and attach event listeners
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const div = addDiv(t);
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div.classList.add('init');
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const eventWatcher = new EventWatcher(t, div, [
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'transitionrun',
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'transitioncancel',
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]);
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// Trigger transition
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getComputedStyle(div).width;
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div.classList.add('change');
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getComputedStyle(div).width;
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await eventWatcher.wait_for('transitionrun');
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// Make the pseudo-element no longer rendered
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div.classList.add('cancel');
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await eventWatcher.wait_for('transitioncancel');
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div.remove();
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style.remove();
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}
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}, 'Transitions on ::before/::after pseudo-elements are canceled when the'
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+ ' content property is cleared');
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</script>
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</body>
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</html>
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