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Improve select restoration with no matching option #57417

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Merged
chromium-wpt-export-bot merged 1 commit into from
Jan 29, 2026
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Merged

Improve select restoration with no matching option #57417

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1 change: 1 addition & 0 deletions html/semantics/forms/the-select-element/resources/blank.html
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
<!DOCTYPE html>
7 changes: 7 additions & 0 deletions html/semantics/forms/the-select-element/resources/select-restore-invalid-option-iframe.html
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<!DOCTYPE html>
<form action="blank.html">
<select>
<option value=a>a</option>
<option value=b>b</option>
</select>
</form>
35 changes: 35 additions & 0 deletions html/semantics/forms/the-select-element/select-restore-invalid-option.html
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<!DOCTYPE html>
<link rel=author href="mailto:[email protected]">
<link rel=help href="https://issues.chromium.org/issues/41360677">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>

<iframe src="resources/select-restore-invalid-option-iframe.html"></iframe>

<script>
const iframe = document.querySelector('iframe');
promise_test(async () => {
await new Promise(resolve => iframe.onload = resolve);
await test_driver.bless();

iframe.contentDocument.querySelector('select').innerHTML = `
<option value=A>a</option>
<option value=B>b</option>
`;
iframe.contentDocument.querySelector('form').submit();
await new Promise(resolve => iframe.onload = resolve);
assert_equals(iframe.contentDocument.querySelector('select'), null,
'There should not be a select element on the blank page.');

await test_driver.bless();
iframe.contentWindow.history.back();
await new Promise(resolve => iframe.onload = resolve);
await new Promise(requestAnimationFrame);
await new Promise(requestAnimationFrame);

assert_equals(iframe.contentDocument.querySelector('select').value, 'a',
'The selects value should be reset after navigating back.');
}, 'The select element should reset to its initial state when restoring a mismatched value.');
</script>