ISSUE-111 (mouse z): Add z attribute to mouse events? [DOM3 Events] http://www.w3.org/2008/webapps/track/issues/111
Raised by: Doug Schepers On product: DOM3 Events With CSS and SVG both adding 3D (2.5D) transformations to the language, with a position on the z-axis, there may well be cause to add z/tz/clientZ attributes to mouse events along with the traditional x and y attributes. This would return the element's z-position, with a default of 0, in case there are any z transforms applied to the element. Note that the z-axis position is different than z-index.