зеркало из https://github.com/mozilla/gecko-dev.git
39 строки
832 B
HTML
39 строки
832 B
HTML
<!DOCTYPE html>
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<html class="reftest-wait">
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<style>
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@keyframes anim {
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from { margin-left: 10em; }
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to { margin-left: 10em; }
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}
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#target::before {
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content: 'before';
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}
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#target.anim::before {
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animation: anim 100s infinite;
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font-size: 10px;
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}
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#target.bigger-font::before {
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font-size: 20px;
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}
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</style>
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<div id="target"></div>
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<script>
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addEventListener('DOMContentLoaded', () => {
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var target = document.getElementById('target');
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// Start an animation on pseudo element.
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target.classList.add('anim');
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requestAnimationFrame(() => {
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// The animation on pseudo element should be updated
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// when the target element classes are modified.
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target.classList.add('bigger-font');
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requestAnimationFrame(() => {
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document.documentElement.classList.remove('reftest-wait');
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});
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});
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});
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</script>
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</html>
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