MouseEvent which Property
Example
Find out which mouse button that was pressed when a mouse event was triggered:
alert("You pressed button: " + event.which)
Try it Yourself »
Definition and Usage
The which property returns a number that indicates which mouse button was pressed when a mouse event was triggered.
This property is mostly used together with the onmousedown event.
Note: The values returned by this property are the same as those returned by the button property plus one.
Note: This property is read-only.
Browser Support
The numbers in the table specify the first browser version that fully supports the property.
| Property | |||||
|---|---|---|---|---|---|
| which | 1.0 | 9.0 | 1.0 | 1.0 | 5.0 |
Syntax
event.which
Technical Details
| Return Value: |
A Number, representing which mouse button that was pressed when the mouse event occured. Possible values:
|
|---|---|
| DOM Version: | DOM Level 2 Events |
Related Pages
HTML DOM reference: MouseEvent button Property
HTML DOM reference: MouseEvent buttons Property
