x
<html><body><h1>The Document Object</h1><h2>The removeEventListener() Method</h2><p>A mousemove event handler displays a random number every time you move your mouse in this document.</p><p>Click "Remove" to remove the event handler.</p><button onclick="removeHandler()">Remove</button><p id="demo"></p><script>document.addEventListener("mousemove", myFunction);function myFunction() { document.getElementById("demo").innerHTML = Math.random();}function removeHandler() { document.removeEventListener("mousemove", myFunction);}</script></body></html>