Jan-Niklas Jaeschke
266698a467
Differential Revision: https://phabricator.services.mozilla.com/D311514
15 lines
241 B
HTML
15 lines
241 B
HTML
<!DOCTYPE html>
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<html>
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<body>
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<select id="s">
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<option value="a">A</option>
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<option value="b">B</option>
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</select>
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<script>
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window.addEventListener("beforeunload", function(event) {
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event.preventDefault();
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});
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</script>
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</body>
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</html>
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