MouseEvent which property

DOM begivenheder MouseEvent

Definition and usage

The which property returns a number indicating which mouse button was pressed when the mouse event was triggered.

This property is mainly used with the onmousedown event.

Note:The value returned by this property is equal to button property The return value is incremented by one.

Note:This property is read-only.

Example

Find out which mouse button was pressed when the mouse event was triggered:

alert("You pressed button: " + event.which)

Try it yourself

Syntax

event.which

Technical details

Return value:

Numeric values representing the mouse button pressed when a mouse event occurs.

Possible values:

  • 0: No button
  • 1: Left mouse button
  • 2: Scroll wheel button or middle button (if available)
  • 3: Right mouse button

Note:For mice configured for left-handed use, the return value is reversed.
DOM version: DOM Level 2 Events

Browserunderstøttelse

Tal i tabellen angiver den første browserversion, der fuldt ud understøtter egenskaben.

Egenskaber Chrome IE Firefox Safari Opera
which 1.0 9.0 1.0 1.0 5.0

Relaterede sider

HTML DOM referencehåndbog:MouseEvent button egenskab

HTML DOM referencehåndbog:MouseEvent buttons egenskab

DOM begivenheder MouseEvent