<!DOCTYPE html>
<html>
<body>
<p>This example demonstrates how to assign an "oninput" event to an input element.</p>
<p>Write something in the text field to trigger a function.</p>
Enter name: <input type="text" value="Mickey" oninput="myFunction()">
<script>
function myFunction() {
alert("The value of the input field was changed.");
}
</script>
</body>
</html>