compositionstart.preventDefault.html

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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>