We had a glimpse of the CSS3 transition and transformation modules in Chapter 1, Introducing HTML5 Games, when we were overviewing the new CSS3 features. We often want to animate the game objects by easing the properties. Transition is the CSS property designed for this purpose. Suppose that we have a playing card on the web page and want to move it to another position in five seconds. We would have to use JavaScript to set up a timer and write our own function to change the position every few milliseconds. By using the transition property, we just need to specify the start and end styles and the duration. The browser optimizes the output and does all the easing and in-between animations.

Let's take a look at some examples to understand this.