Keyboard Input

There are three types of keyboard events: keydown, keypress, and keyup. For most keys, Gecko dispatches a sequence of key events like this:

1. When the key is first pressed, the keydown event is sent.

2. If the key is not a modifier key, the keypress event is sent.

3. When the user releases the key, the keyup event is sent.

Key	event.key	event.code
Z	z (lowercase)	KeyZ
Shift+Z	Z (uppercase)	KeyZ