<html><head><style>#myDIV { background-color: coral; border: 1px solid; padding: 50px; color: white; font-size: 20px;}</style></head><body><h2>JavaScript removeEventListener()</h2><div id="myDIV"> <p>This div element has an onmousemove event handler that displays a random number every time you move your mouse inside this orange field.</p> <p>Click the button to remove the div's event handler.</p> <button onclick="removeHandler()" id="myBtn">Remove</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>