CSS transition between left -> right and top -> bottom positions

Question

Is it possible to use CSS transitions to animate something between a position set as left: 0px to right: 0px so it goes all the way across the scre

Answer 1

In more modern browsers (including IE 10+) you can now use calc():

.moveto {
  top: 0px;
  left: calc(100% - 50px);
}