by kirupa | 7 June 2013
The most important part of creating an animation is specifying the rate at which a property value changes from one value to another. Does the value get there directly at a constant rate? Does the value speed up initially and then slow down? Does the value instead start slowly and then speed up? Is there a bounce at the end? The answers to all of these questions are important details that you specify, and it is these details that really give life to your animation. Basically, this is something you can't ignore.