The DOMPointInit dictionary's x property is used to specify the x component of a point in 2D or 3D space when either creating or serializing a DOMPoint or DOMPointReadOnly.

In general, positive values x mean to the right, and negative values of x means to the left, assuming that transforms have not altered the orientation of the axes.


var DOMPointInit = {
  x: xPos

DOMPointInit.x = xPos;

var xPos = DOMPointInit.x;


A double-precision floating-point value indicating the point's x coordinate. This value is unrestricted, meaning that it is allowed to be infinite or invalid (that is, its value may be NaN or ±Infinity).

If this property is missing when the DOMPointInit object is passed into fromPoint(), the value is assumed to be 0 by default.

DOMPointInit is used as an input when calling either DOMPointReadOnly.fromPoint() or DOMPoint.fromPoint(), and is returned by the DOMPointReadOnly.toJSON() and DOMPoint.toJSON() methods.


Specification Status Comment
Geometry Interfaces Module Level 1
The definition of 'x' in that specification.
Candidate Recommendation Initial definition

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Chrome ? Edge ? Firefox Full support 62IE No support NoOpera ? Safari No support NoWebView Android ? Chrome Android ? Firefox Android Full support 62Opera Android ? Safari iOS No support NoSamsung Internet Android ?


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.