DOMPoint: fromPoint() static method
The DOMPoint
static method
fromPoint()
creates and returns a new mutable DOMPoint
object given a source point.
You can also create a new DOMPoint
object using the
new DOMPoint()
constructor.
Although this interface is based on DOMPointReadOnly
, it is not read-only;
the properties within may be changed at will.
Syntax
js
DOMPoint.fromPoint(sourcePoint)
Parameters
sourcePoint
-
A
DOMPoint
orDOMPointReadOnly
instance, or an object containing the following properties, from which to take the values of the new point's properties: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 is0
. 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 is0
. 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 is0
. w
-
The point's
w
perspective value, given as an unrestricted floating-point number. The default is1
.
Return value
A new DOMPoint
object whose coordinate and perspective values are
identical to those in the source point. The point's properties are mutable and may be
changed at any time.
Examples
Creating a mutable point from a read-only point
If you have a DOMPointReadOnly
object, you can easily create a mutable
copy of that point:
js
const mutablePoint = DOMPoint.fromPoint(readOnlyPoint);
Creating a 2D point
Specifications
Specification |
---|
Geometry Interfaces Module Level 1 # dom-dompoint-frompoint |
Browser compatibility
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