INTERVIEW QUESTIONS WEB JAVA SCRIPT DETAILS

Question: How to remove the event listener?

Answer: <script type="text/javascript">
document.getElementById("hitme4").removeEventListener("click", hitme4, false);
</script>

Key Events

"onkeydown", "onkeypress", "onkeyup" events are supported both in ie and standards-based browsers.

<script type="text/javascript">
function setStatus(name,evt) {
evt = (evt) ? evt : ((event) ? event : null); /* ie or standard? */
var charCode = evt.charCode;
var status = document.getElementById("keyteststatus");
var text = name +": "+evt.keyCode;
status.innerHTML = text;
status.textContent = text;
}
</script>
<form action="">
<input type="text" name="keytest" size="1" value=""
onkeyup="setStatus('keyup',event)"
onkeydown="setStatus('keydown',event)"
/>
<p id="keyteststatus">status</p>
</form>

<script type="text/javascript">
document.getElementById("hitme4").removeEventListener("click", hitme4, false);
</script>

Key Events

"onkeydown", "onkeypress", "onkeyup" events are supported both in ie and standards-based browsers.

<script type="text/javascript">
function setStatus(name,evt) {
evt = (evt) ? evt : ((event) ? event : null); /* ie or standard? */
var charCode = evt.charCode;
var status = document.getElementById("keyteststatus");
var text = name +": "+evt.keyCode;
status.innerHTML = text;
status.textContent = text;
}
</script>
<form action="">
<input type="text" name="keytest" size="1" value=""
onkeyup="setStatus('keyup',event)"
onkeydown="setStatus('keydown',event)"
/>
<p id="keyteststatus">status</p>
</form> Source: CoolInterview.com

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