x
<html><body><h1>HTML DOM Events</h1><h2>The keyup Event</h2><p>Use the addEventListener() method to attach a "keyup" event to an input element.</p><p>A function is triggered when the user releases a key in the input field.</p><p>The function transforms the input field to upper case:</p>Enter your name: <input type="text" id="fname"><script>document.getElementById("fname").addEventListener("keyup", myFunction);function myFunction() { let x = document.getElementById("fname"); x.value = x.value.toUpperCase();}</script></body></html>