z property specifies the depth coordinate of a point in
space. Unless transforms have changed the orientation, a
z of 0 is
the plane of the screen, with positive values extending outward toward the user from the
screen, and negative values receding into the distance behind the screen.
var zPos = DOMPoint.z;
A double-precision floating-point value indicating the z coordinate's value
for the point. This value is unrestricted, meaning that it is allowed
to be infinite or invalid (that is, its value may be
|Geometry Interfaces Module Level 1
The definition of 'z' in that specification.
|Candidate Recommendation||Initial definition|
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