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<!DOCTYPE html> <html> <head> <title>HTML onkeyup Attribute Example</title> <meta charset="utf-8" /> <style> input[type="text"] { width: 230px; height: 30px; background-color: #efffff; font-size: 14pt; color: #000; border-radius: 5px; margin: 5px; } input[type="text"]:hover { background-color: #fff; } </style> </head> <body> <h2>HTML onkeyup Attribute Example</h2> <p>Type Characters in the textfield to fire keyup event.</p> Name: <input type="text" name="name" id="name" onkeyup="myFunction(event)"><br> <script> function myFunction(e) { alert(e.key.toUpperCase()); } </script> </body> </html>