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<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
test(() => {
let navigateEvent;
let navigateError_called = false;
navigation.onnavigate = e => navigateEvent = e;
navigation.onnavigateerror = () => navigateError_called = true;
navigation.navigate("#1");
assert_false(navigateEvent.defaultPrevented);
assert_false(navigateError_called);
navigation.navigate("#2");
assert_false(navigateEvent.defaultPrevented);
assert_true(navigateError_called);
}, "navigateEvent.defaultPrevented isn't affected when the navigation is preempted after dispatch");
</script>
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