The DOMPoint interface's 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.

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 NaN or ±Infinity).

• The other coordinate properties: x, y, and the perspective value, w.