Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.
UIEvent.which read-only property of the
UIEvent interface returns a number that indicates which button was pressed on the mouse, or the numeric
keyCode or the character code (
charCode) of the key pressed on the keyboard.
event.which contains the numeric code for a particular key pressed, depending on whether an alphanumeric or non-alphanumeric key was pressed.
Please see deprecated
KeyboardEvent.keyCode for more details.
event.which is a number representing a given button:
0: No button
1: Left button
2: Middle button (if present)
3: Right button
For a mouse configured for left-handed use, the button actions are reversed. In this case, the values are read from right to left.
MouseEvent.button for new code.
|UI Events |
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