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<!DOCTYPE HTML>
<html>
<head>
<title> W3C DOM Level 3 Event Object method: stopPropagation </title>
<script type="text/javascript">
var PassTest = function()
{
document.getElementById("testresult").firstChild.data = "PASS";
}
var FailTest = function()
{
document.getElementById("testresult").firstChild.data = "FAIL";
}
var EVENT = "mousedown";
var TARGET, PARENT;
var ActualResult = [];
var ExpectResult = [];
window.onload = function()
{
try
{
TARGET = document.getElementById("target");
PARENT = document.getElementById("parent");
ExpectResult = [document.body, PARENT];
TARGET.addEventListener(EVENT, TestEvent, true);
TARGET.addEventListener(EVENT, TestEvent, false);
PARENT.addEventListener(EVENT, TestEvent, true);
PARENT.addEventListener(EVENT, TestEvent, false);
document.body.addEventListener(EVENT, TestEvent, true);
}
catch(ex)
{
FailTest();
}
}
function TestEvent(evt)
{
ActualResult.push(evt.currentTarget);
if (evt.currentTarget == PARENT)
{
try
{
evt.stopPropagation();
}
catch(ex)
{
}
}
}
function VerifyTest()
{
if (ActualResult.toString() == ExpectResult.toString())
{
PassTest();
}
else
{
FailTest();
}
}
</script>
</head>
<body>
<h4>
Test Description:
stopPropagation prevents other event listeners from being triggered.
</h4>
<div id="parent">
Click the button: <input id="target" type="button" value="Target" onmouseup="VerifyTest()" />
</div>
<p>Test passes if the word "PASS" appears below after clicking the above button using mouse.</p>
<div>Test result: </div>
<div id='testresult'>FAIL</div>
</body>
</html>
|
