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Result Size: 625 x 571
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<!DOCTYPE html>
<html>
<body>
<p>The removeEventListener() method is not supported Internet Explorer 8 and earlier versions.</p>
<p>This example demonstrates a solution that will work for all browsers.</p>
<p>This document has an onmousemove event handler attached with the addEventListener() method, that displays a random number every time you move your mouse in this document.</p>
<p>Click the button to remove the event handler.</p>
<button onclick="removeHandler()" id="myBtn">Try it</button>
<p id="demo"></p>
<script>
if (document.addEventListener) {
  document.addEventListener("mousemove", myFunction);
} else if (document.attachEvent) {
  document.attachEvent("onmousemove", myFunction);
}
function myFunction() {
  document.getElementById("demo").innerHTML = Math.random();
}
function removeHandler() {
  if (document.removeEventListener) {
    document.removeEventListener("mousemove", myFunction);
  } else if (document.detachEvent) {
    document.detachEvent("onmousemove", myFunction);
  }
}
</script>
</body>
<!-- Mirrored from www.w3schools.com/jsref/tryit.asp?filename=tryjsref_document_removeeventlistener_crossbrowser by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 03:02:17 GMT -->
</html>
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