Simplest way to detect keypresses in JavaScript?

Javascript Web Development Object Oriented Programming

The easiest way to detect keypresses in JavaScript, use the onKeyPress event handler −

document.onkeypress

The key press is matched with the keyCode property, which returns the Unicode character code of the key that triggered the onkeypress event.

Example

Live Demo

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initialscale=
1.0">
<title>Document</title>
</head>
<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>
<body>
<script>
   document.onkeypress = function (eventKeyName) {
      eventKeyName = eventKeyName || window.event;
      if(eventKeyName.keyCode==13){
         console.log('You have pressed enter key');
      } else {
         alert(String.fromCharCode(eventKeyName.keyCode))
   }
};
</script>
</body>
</html>

To run the above program, save the file name “anyName.html(index.html)” and right click on the file. Select the option “Open with Live Server” in VS Code editor.