11 lines
239 B
HTML
11 lines
239 B
HTML
<!DOCTYPE html>
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<style>
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.x { position: absolute; color: red; }
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.y { color: green; }
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</style>
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<div class=x>hello</div>
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<script>
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document.body.offsetHeight;
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document.querySelector(".x").className = "y";
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document.body.offsetHeight;
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</script>
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