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<!DOCTYPE html>
<meta charset="utf-8">
<title>Focus Navigation for the radio group</title>
<link rel="author" href="mailto:zhoupeng.1996@bytedance.com">
<link rel="help" href="https://issues.chromium.org/issues/421837104">
<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>
<script src="/resources/testdriver-actions.js"></script>
<script src="resources/focus-utils.js"></script>
<input type="text" id="start">
<form>
<input type="radio" name="radio" id="a">
<input type="radio" name="radio" id="b">
<input type="radio" name="radio" id="c">
</form>
<input type="text" id="end">
<script>
promise_test(async () => {
start.focus();
assert_equals(document.activeElement, start);
await navigateFocusForward();
assert_equals(document.activeElement, a);
await navigateFocusForward();
assert_equals(document.activeElement, end);
await navigateFocusBackward();
assert_equals(document.activeElement, a);
await navigateFocusBackward();
assert_equals(document.activeElement, start);
}, 'Both forward and backward focus navigation target the radio group first element.');
</script>
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