Web/API/Touch

The Touch interface represents a single contact point on a touch-sensitive device. The contact point is commonly a finger or stylus and the device may be a touchscreen or trackpad.

The Touch.radiusX, Touch.radiusY, and Touch.rotationAngle describe the area of contact between the user and the screen, the touch area. This can be helpful when dealing with imprecise pointing devices such as fingers. These values are set to describe an ellipse that as closely as possible matches the entire area of contact (such as the user's fingertip). '

Note: Many of the properties' values are hardware-dependent; for example, if the device doesn't have a way to detect the amount of pressure placed on the surface, the force value will always be 0. This may also be the case for radiusX and radiusY; if the hardware reports only a single point, these values will be 1.

Constructor

Touch() ': Creates a Touch object.

Properties

This interface has no parent, and doesn't inherits or implements any other property.

Basic properties

Touch.identifier Read only: Returns a unique identifier for this Touch object. A given touch point (say, by a finger) will have the same identifier for the duration of its movement around the surface. This lets you ensure that you're tracking the same touch all the time.
Touch.screenX Read only: Returns the X coordinate of the touch point relative to the left edge of the screen.
Touch.screenY Read only: Returns the Y coordinate of the touch point relative to the top edge of the screen.
Touch.clientX Read only: Returns the X coordinate of the touch point relative to the left edge of the browser viewport, not including any scroll offset.
Touch.clientY Read only: Returns the Y coordinate of the touch point relative to the top edge of the browser viewport, not including any scroll offset.
Touch.pageX Read only: Returns the X coordinate of the touch point relative to the left edge of the document. Unlike clientX, this value includes the horizontal scroll offset, if any.
Touch.pageY Read only: Returns the Y coordinate of the touch point relative to the top of the document. Unlike clientY, this value includes the vertical scroll offset, if any.
Touch.target Read only: Returns the Element on which the touch point started when it was first placed on the surface, even if the touch point has since moved outside the interactive area of that element or even been removed from the document.

Touch area

This is an experimental technologyCheck the Browser compatibility table carefully before using this in production.

Touch.radiusX Read only ': Returns the X radius of the ellipse that most closely circumscribes the area of contact with the screen. The value is in pixels of the same scale as screenX.
Touch.radiusY Read only ': Returns the Y radius of the ellipse that most closely circumscribes the area of contact with the screen. The value is in pixels of the same scale as screenY.
Touch.rotationAngle Read only ': Returns the angle (in degrees) that the ellipse described by radiusX and radiusY must be rotated, clockwise, to most accurately cover the area of contact between the user and the surface.
Touch.forceRead only ': Returns the amount of pressure being applied to the surface by the user, as a float between 0.0 (no pressure) and 1.0 (maximum pressure).

Methods

This interface has no method and no parent, and doesn't inherits or implements any method.

Specifications

Specification	Status	Comment
Touch Events – Level 2The definition of 'Touch' in that specification.	Draft	Added `radiusX`, `radiusY`, `rotationAngle`, `force` properties, as well as the `Touch()` constructor.
Touch EventsThe definition of 'Touch' in that specification.	Recommendation	Initial definition.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`Touch`	Chrome Full support 22	Edge Full support ≤18	Firefox Full support 52 Notes' Full support 52 Notes' Notes' Touch events support has been fixed and reenabled in Windows desktop platforms. No support 18 — 24 Notes' Notes' Web compatibility issues seen in bug 888304.	IE No support No	Opera Full support Yes	Safari No support No	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 6	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
`Touch()` constructor Experimental'	Chrome Full support 48	Edge Full support 79	Firefox Full support 46	IE No support No	Opera Full support 35	Safari No support No	WebView Android Full support 48	Chrome Android Full support 48	Firefox Android Full support 6	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support 5.0
`clientX`	Chrome Full support 22	Edge Full support ≤18	Firefox Full support 52 Notes' Full support 52 Notes' Notes' Touch events support has been fixed and reenabled in Windows desktop platforms. No support 18 — 24 Notes' Notes' Web compatibility issues seen in bug 888304.	IE No support No	Opera Full support Yes	Safari No support No	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 6	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
`clientY`	Chrome Full support 22	Edge Full support ≤18	Firefox Full support 52 Notes' Full support 52 Notes' Notes' Touch events support has been fixed and reenabled in Windows desktop platforms. No support 18 — 24 Notes' Notes' Web compatibility issues seen in bug 888304.	IE No support No	Opera Full support Yes	Safari No support No	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 6	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
`force` Experimental'	Chrome Full support Yes	Edge Full support ≤79	Firefox Full support Yes	IE No support No	Opera Full support Yes	Safari No support No	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
`identifier`	Chrome Full support 22	Edge Full support ≤18	Firefox Full support 52 Notes' Full support 52 Notes' Notes' Touch events support has been fixed and reenabled in Windows desktop platforms. No support 18 — 24 Notes' Notes' Web compatibility issues seen in bug 888304.	IE No support No	Opera Full support Yes	Safari No support No	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 6	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
`pageX`	Chrome Full support 22	Edge Full support ≤18	Firefox Full support 52 Notes' Full support 52 Notes' Notes' Touch events support has been fixed and reenabled in Windows desktop platforms. No support 18 — 24 Notes' Notes' Web compatibility issues seen in bug 888304.	IE No support No	Opera Full support Yes	Safari No support No	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 6	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
`pageY`	Chrome Full support 22	Edge Full support ≤18	Firefox Full support 52 Notes' Full support 52 Notes' Notes' Touch events support has been fixed and reenabled in Windows desktop platforms. No support 18 — 24 Notes' Notes' Web compatibility issues seen in bug 888304.	IE No support No	Opera Full support Yes	Safari No support No	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 6	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
`radiusX` Experimental'	Chrome Full support 43	Edge Full support ≤79	Firefox ?	IE No support No	Opera Full support Yes	Safari No support No	WebView Android Full support 43	Chrome Android Full support 43	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support 4.0
`radiusY` Experimental'	Chrome Full support 43	Edge Full support ≤79	Firefox ?	IE No support No	Opera Full support Yes	Safari No support No	WebView Android Full support 43	Chrome Android Full support 43	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support 4.0
`rotationAngle` Experimental'	Chrome Full support 43	Edge Full support ≤79	Firefox ?	IE No support No	Opera Full support Yes	Safari No support No	WebView Android Full support 43	Chrome Android Full support 43	Firefox Android Full support Yes	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support 4.0
`screenX`	Chrome Full support 22	Edge Full support ≤18	Firefox Full support 52 Notes' Full support 52 Notes' Notes' Touch events support has been fixed and reenabled in Windows desktop platforms. No support 18 — 24 Notes' Notes' Web compatibility issues seen in bug 888304.	IE No support No	Opera Full support Yes	Safari No support No	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 6	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
`screenY`	Chrome Full support 22	Edge Full support ≤18	Firefox Full support 52 Notes' Full support 52 Notes' Notes' Touch events support has been fixed and reenabled in Windows desktop platforms. No support 18 — 24 Notes' Notes' Web compatibility issues seen in bug 888304.	IE No support No	Opera Full support Yes	Safari No support No	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 6	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes
`target`	Chrome Full support 22	Edge Full support ≤18	Firefox Full support 52 Notes' Full support 52 Notes' Notes' Touch events support has been fixed and reenabled in Windows desktop platforms. No support 18 — 24 Notes' Notes' Web compatibility issues seen in bug 888304.	IE No support No	Opera Full support Yes	Safari No support No	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 6	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes

Legend

Full support: Full support
No support: No support
Compatibility unknown: Compatibility unknown
Experimental. Expect behavior to change in the future.': Experimental. Expect behavior to change in the future.
See implementation notes.': See implementation notes.