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008.html
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008.html
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<!DOCTYPE html>
<html>
<head>
<style>
#myDIV {
background-color: coral;
border: 1px solid;
padding: 50px;
color: white;
}
</style>
</head>
<body>
<div id="myDIV">This div element has an onmousemove event handler that displays a random number every time you move your mouse inside this orange field.
<p>Click the button to remove the DIV's event handler.</p>
<button onclick="removeHandler()" id="myBtn">Try it</button>
</div>
<p id="demo"></p>
<script>
document.getElementById("myDIV").addEventListener("mousemove", myFunction);
function myFunction() {
document.getElementById("demo").innerHTML = Math.random();
}
function removeHandler() {
document.getElementById("myDIV").removeEventListener("mousemove", myFunction);
}
</script>
</body>
</html>