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<!DOCTYPE html> <html> <body> <p>Press a key on the keyboard in the input field to get the Unicode character code of the pressed key.</p> <input type="text" size="40" onkeypress="myFunction(event)"> <p id="demo"></p> <p><strong>Note:</strong> The which property is not supported in IE8 and earlier versions.</p> <script> function myFunction(event) { var x = event.which; document.getElementById("demo").innerHTML = "The Unicode value is: " + x; } </script> </body> </html>