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<!DOCTYPE HTML>
<html>
<head>
<title id='desc'> Cancelling compositionstart Event via Event.preventDefault() </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 = "compositionstart";
var TARGET;
window.onload = function(e)
{
try
{
TARGET = document.getElementById("target");
TARGET.addEventListener(EVENT, TestEvent, true);
TARGET.addEventListener("keyup", TestEvent, true);
}
catch(ex)
{
FailTest();
}
}
function TestEvent(evt)
{
if (evt.type == EVENT)
{
evt.preventDefault();
}
if (evt.type == "keyup")
{
if (TARGET.value == "")
{
PassTest();
}
else
{
FailTest();
}
}
}
</script>
</head>
<body>
<h3>DOM Events</h3>
<h4>
Test Description: The default action of compositionstart event is to launch the appropriate text
composition system. If this event is canceled, the text composition system must not be launched.
</h4>
<pre>
<input id="target" value=""/>
Steps:
1) Open Japanese Microsoft IME and select Hiragana input method
2) Click at the above textbox and then type 'a' using keyboard
</pre>
<p>Test passes if the word "PASS" appears below and nothing is typed to the textbox after following the above steps.</p>
<div>Test result: </div>
<div id='testresult'>FAIL</div>
</body>
</html>