The DOMPoint interface's w property holds the point's perspective value, w, for a point in space.
The DOMPoint interface's x property holds the horizontal coordinate, x, for a point in space.
The DOMPoint interface's y property holds the vertical coordinate, y, for a point in space.
The DOMPoint interface's z property specifies the depth coordinate of a point in space.
The matrixTransform() method of the DOMPointReadOnly interface applies a matrix transform specified as an object to the DOMPointReadOnly object, creating and returning a new DOMPointReadOnly object. Neither the matrix nor the point are altered.
Optionalmatrix: DOMMatrixInitThe DOMPointReadOnly method toJSON() returns an object giving the JSON form of the point object.
A
DOMPointobject represents a 2D or 3D point in a coordinate system; it includes values for the coordinates in up to three dimensions, as well as an optional perspective value. DOMPoint is based on DOMPointReadOnly but allows its properties' values to be changed.MDN Reference