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Element: gesturestart event

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.

The gesturestart event is fired when multiple fingers contact the touch surface, thus starting a new gesture. During the gesture, gesturechange events will be fired. When the gesture has ended, a gestureend event will be fired.

It is a proprietary event specific to WebKit.

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

addEventListener("gesturestart", (event) => { })

ongesturestart = (event) => { }

Event type

A GestureEvent. Inherits from Event.

Event properties

This interface also inherits properties of its parents, UIEvent and Event.

GestureEvent.rotation Read only: Change in rotation (in degrees) since the event's beginning. Positive values indicate clockwise rotation; negative values indicate counterclockwise rotation. Initial value: 0.0.
GestureEvent.scale Read only: Distance 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.

Specifications

Not part of any specification.

Browser compatibility