19 lines
284 B
HTML
19 lines
284 B
HTML
<!doctype html>
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<style>
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.foo > div::before {
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display: block;
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width: 100px;
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height: 100px;
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background: green;
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content: "";
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}
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</style>
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<div class="foo">
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<div>
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</div>
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</div>
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<script>
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onload = function() {
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document.querySelector('.foo').className = 'foo bar';
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}
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</script>
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