15 lines
354 B
HTML
15 lines
354 B
HTML
<!DOCTYPE html>
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<!-- fieldset with one invalid element and a barred for constraint validation element -->
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<html>
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<head>
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<style>
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fieldset:valid { display: none; }
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</style>
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</head>
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<body>
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<fieldset id="fieldset">
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<input id='i' value='bar' required>
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<input id='i' value='foo' readonly required>
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</fieldset>
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</body>
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</html>
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