GestureEvent
Non-standard: This feature is not standardized. We do not recommend using non-standard features in production, as they have limited browser support, and may change or be removed. However, they can be a suitable alternative in specific cases where no standard option exists.
TheGestureEvent is a proprietary interface specific to WebKit which gives information regarding multi-touch gestures. Events using this interface includegesturestart,gesturechange, andgestureend.
Instance properties
This interface also inherits properties of its parents,UIEvent andEvent.
GestureEvent.rotationRead onlyNon-standardChange in rotation (in degrees) since the event's beginning. Positive values indicate clockwise rotation; negative values indicate counterclockwise rotation. Initial value:
0.0.GestureEvent.scaleRead onlyNon-standardDistance between two digits since the event's beginning. Expressed as a floating-point multiple of the initial distance between the digits at the beginning of the gesture. Values below 1.0 indicate an inward pinch (zoom out). Values above 1.0 indicate an outward unpinch (zoom in). Initial value:
1.0.
Instance methods
This interface also inherits methods of its parents,UIEvent andEvent.
GestureEvent.initGestureEvent()Non-standardInitializes the value of a
GestureEvent. If the event has already been dispatched, this method does nothing.
Gesture event types
Specifications
Not part of any specification. Apple hasa description at the Safari Developer Library.