Web/API/DOMPointInit

The DOMPointInit dictionary is used to provide the values of the coordinates and perspective when creating and JSONifying a DOMPoint or DOMPointReadOnly object.

It's used as an input parameter to the DOMPoint/DOMPointReadOnly method fromPoint(). It's used as the return value when calling toJSON().

Properties

DOMPointInit.x

An unrestricted floating-point value indicating the x-coordinate of the point in space. This is generally the horizontal coordinate, with positive values being to the right and negative values to the left. The default value is 0.

DOMPointInit.y

An unrestricted floating-point number providing the point's y-coordinate. This is the vertical coordinate, and barring any transforms applied to the coordinate system, positive values are downward and negative values upward toward the top of the screen. The default is 0.

DOMPointInit.z

An unrestricted floating-point value which gives the point's z-coordinate, which is (assuming no transformations that alter the situation) the depth coordinate; positive values are closer to the user and negative values retreat back into the screen. The default value is 0.

DOMPointInit.w

The point's w perspective value, given as an unrestricted floating-point number. The default is 1.

Example

This example creates a new DOMPoint representing the top-left corner of the current window, with a z component added to move the point closer to the user. This same code will work to create a DOMPointReadOnly object; just change the interface name in the code.

const pointDesc = {
  x: window.screenX,
  y: window.screenY,
  z: 5.0
};

const windTopLeft = DOMPoint.fromPoint(pointDesc)

Specifications

Specification	Status	Comment
Geometry Interfaces Module Level 1The definition of 'DOMPointReadOnly.fromPoint()' in that specification.	Candidate Recommendation	Initial definition

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

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
DOMPointInit Experimental'	Chrome ?	Edge ?	Firefox Full support 62	IE No support No	Opera ?	Safari No support No	WebView Android ?	Chrome Android ?	Firefox Android Full support 62	Opera Android ?	Safari iOS No support No	Samsung Internet Android ?
w Experimental'	Chrome ?	Edge ?	Firefox Full support 62	IE No support No	Opera ?	Safari No support No	WebView Android ?	Chrome Android ?	Firefox Android Full support 62	Opera Android ?	Safari iOS No support No	Samsung Internet Android ?
x Experimental'	Chrome ?	Edge ?	Firefox Full support 62	IE No support No	Opera ?	Safari No support No	WebView Android ?	Chrome Android ?	Firefox Android Full support 62	Opera Android ?	Safari iOS No support No	Samsung Internet Android ?
y Experimental'	Chrome ?	Edge ?	Firefox Full support 62	IE No support No	Opera ?	Safari No support No	WebView Android ?	Chrome Android ?	Firefox Android Full support 62	Opera Android ?	Safari iOS No support No	Samsung Internet Android ?
z Experimental'	Chrome ?	Edge ?	Firefox Full support 62	IE No support No	Opera ?	Safari No support No	WebView Android ?	Chrome Android ?	Firefox Android Full support 62	Opera Android ?	Safari iOS No support No	Samsung Internet Android ?

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.

DOMPointInit by Mozilla Contributors is licensed under CC-BY-SA 2.5.