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.
var buttonPressed = instanceOfMouseEvent.which
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.
This is not part of any specification.
|Feature||Android webview||Chrome for Android||Edge mobile||Firefox for Android||Opera Android||iOS Safari||Samsung Internet|
mousemove events, the
which property is incorrectly always set to