Why CSS3 perspective is not working in firefox

问题

I am trying to create a 3d flipcard . But perspective property is not working in firefox v21 .

see the code http://codepen.io/prantor19/pen/cgoKm

can you explain why?

回答1:

you forgot px after perspective value!!

like this:

  -webkit-perspective:600px;
  -moz-perspective:600px;
  perspective:600px;

回答2:

-webkit-perspective:600;

-webkit-perspective:600px;

perspective:600px;

'perspective:600px;' is ok in chrome,but 'perspective:600;' has wrong with it.

来源：https://stackoverflow.com/questions/16751007/why-css3-perspective-is-not-working-in-firefox