How Can I Determine the Pressed Key in jQuery's Keypress Event?

How to Determine Which Key Was Pressed in jQuery's Keypress Event

When using the keypress event within jQuery, it becomes necessary to identify the specific key pressed. Understanding the distinction between key codes and which property is crucial for this purpose.

Key Code vs. Which Property

There are two primary methods for retrieving the key code when binding to the keypress event: the keyCode and which properties. Typically, keyCode returns the key code, while which provides the Unicode character code. However, some browsers may differ in their implementation.

Implementation Considerations

For the specific case of detecting Enter (which is never a Unicode key), both keyCode and which will return the same value of 13. However, if you plan to handle a wider range of keys, using both keyCode and which properties can help ensure compatibility across browsers. Here's an updated code snippet that incorporates this approach:

$('#searchbox input').bind('keypress', function(e) {
  var code = e.keyCode || e.which;
  if(code == 13) { //Enter keycode
    //Do something
  }
});

By utilizing this technique, you can accurately identify the pressed key when handling keypress events.

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