Описание: For key or mouse events, this property indicates the specific key or button that was pressed.
Добавлен в версии: 1.1.3event.which
event.which property normalizes
event.charCode. It is recommended to watch
event.which for keyboard key input. For more detail, read about event.charCode on the MDN.
event.which also normalizes button presses (
1 for left button,
2 for middle, and
3 for right. Use
event.which instead of