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<!DOCTYPE html>
<meta charset="utf-8">
<title>Setting a default presentation request</title>
<link rel="author" title="Tomoyuki Shimizu" href="https://github.com/tomoyukilabs">
<link rel="help" href="http://w3c.github.io/presentation-api/#controlling-user-agent">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
test(() => {
assert_equals(navigator.presentation.defaultRequest, null, 'The initial value of the default presentation request is null.');
const request = new PresentationRequest('https://example.org/');
navigator.presentation.defaultRequest = request;
assert_equals(navigator.presentation.defaultRequest, request, 'The default presentation request is set to an instance of PresentationRequest.');
assert_throws_js(TypeError, () => {
navigator.presentation.defaultRequest = {};
}, 'The default presentation request cannot be set to any value but an instance of PresentationRequest or null.');
navigator.presentation.defaultRequest = null;
assert_equals(navigator.presentation.defaultRequest, null, 'The default presentation request is set to null.');
});
</script>
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