In the first 3D Transforms syn­tax, that’s used in the book, the perspective() func­tion and perspective prop­er­ties shown in Chapter 14 accept a whole num­ber. However, that has since been changed (although the spec hasn’t updated yet) so that these val­ues are instead length units; for example:

perspective: 50px;
transform: perspective(50px);

Because of this, the code examples for 14–09 and 14–10 should be updated to show the px unit after the val­ues, and the sen­tence which begins:

The value depth is an integer…

Should be changed to:

The value depth is a length unit…

The online examples 14–09 and 14–10 have been updated.

— 7 January, 2012

All updates & errata