Using Events
<html>
<head></head>
<body>
<label>
Type something in:
<input type="text" onkeydown="handleKey(event)">
</label>
<h1 id="letter-display">?</h1>
<script>
const letterDisplay = document.getElementById("letter-display");
function handleKey(event) {
letterDisplay.innerText = event.key;
}
</script>
</body>
</html>