For this, use the concept of document.getElementById() along with addEventListener(). Following is the JavaScript code −
Example
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
</head>
<body>
<label> Enter the value:</label>
<input id="enterValue" type="text">
</body>
<script>
document.getElementById('enterValue').addEventListener("input", function () {
console.log('you have entered the value');
});
</script>
</html>To run the above program, save the file nameanyName.html(index.html) and right click on the file and select the option open with live server in VS code editor.
Output
When user enters a value −
