The DOMPointInit
dictionary's w
property is used to specify the w perspective value of a point in space when either creating or serializing to JSON a DOMPoint
or DOMPointReadOnly
object.
Syntax
var DOMPointInit = { w: wPerspective }; DOMPointInit.w = wPerspective; var wPerspective = DOMPointInit.w;
Value
A double-precision floating-point value indicating the point's w perspective value. This value is unrestricted, meaning that it is allowed to be infinite or invalid (that is, its value may be NaN
or Β±Infinity
).
There are two methods which use DOMPointInit
:
- The static function
DOMPointReadOnly.fromPoint()
takes an object that complies withDOMPointInit
as its sole input parameter, to specify the coordinates and perspective value of the new point to be created. This method is, by inheritance, also available asDOMPoint.fromPoint()
. - The
DOMPointReadOnly.toJSON()
method returns aDOMPointInit
object that describes the same point as the original point. By inheritance, this method is also available asDOMPoint.toJSON()
.
This value is assumed to be 1 by default if not included in the DOMPointInit
object passed into fromPoint()
.
Specifications
Specification | Status | Comment |
---|---|---|
Geometry Interfaces Module Level 1 The definition of 'w' 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.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
w | 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.