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17 lines
282 B
HTML
17 lines
282 B
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<style>
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div:after { content: 'X'; border:1px solid red; }
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div.foo:after { content: 'Y'; }
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</style>
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</head>
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<body>
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<div id="d"></div>
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<script>
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document.body.offsetTop;
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document.getElementById("d").setAttribute("class", "foo");
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</script>
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</body>
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</html>
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