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<!DOCTYPE html>
<meta charset=utf-8>
<title>EventTarget.dispatchEvent: return value</title>
<link rel="help" href="https://dom.spec.whatwg.org/#concept-event-dispatch">
<link rel="help" href="https://dom.spec.whatwg.org/#dom-event-preventdefault">
<link rel="help" href="https://dom.spec.whatwg.org/#dom-event-returnvalue">
<link rel="help" href="https://dom.spec.whatwg.org/#dom-event-defaultprevented">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id=log></div>
<table id="table" border="1" style="display: none">
<tbody id="table-body">
<tr id="table-row">
<td id="table-cell">Shady Grove</td>
<td>Aeolian</td>
</tr>
<tr id="parent">
<td id="target">Over the river, Charlie</td>
<td>Dorian</td>
</tr>
</tbody>
</table>
<script>
test(function() {
var event_type = "foo";
var target = document.getElementById("target");
var parent = document.getElementById("parent");
var default_prevented;
var return_value;
parent.addEventListener(event_type, function(e) {}, true);
target.addEventListener(event_type, function(e) {
evt.preventDefault();
default_prevented = evt.defaultPrevented;
return_value = evt.returnValue;
}, true);
target.addEventListener(event_type, function(e) {}, true);
var evt = document.createEvent("Event");
evt.initEvent(event_type, true, true);
assert_true(parent.dispatchEvent(evt));
assert_false(target.dispatchEvent(evt));
assert_true(default_prevented);
assert_false(return_value);
}, "Return value of EventTarget.dispatchEvent() affected by preventDefault().");
test(function() {
var event_type = "foo";
var target = document.getElementById("target");
var parent = document.getElementById("parent");
var default_prevented;
var return_value;
parent.addEventListener(event_type, function(e) {}, true);
target.addEventListener(event_type, function(e) {
evt.returnValue = false;
default_prevented = evt.defaultPrevented;
return_value = evt.returnValue;
}, true);
target.addEventListener(event_type, function(e) {}, true);
var evt = document.createEvent("Event");
evt.initEvent(event_type, true, true);
assert_true(parent.dispatchEvent(evt));
assert_false(target.dispatchEvent(evt));
assert_true(default_prevented);
assert_false(return_value);
}, "Return value of EventTarget.dispatchEvent() affected by returnValue.");
</script>
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