Behaviors let you add animation and motion to your application when some user or programmatic action occurs, where a behavior is a combination of a trigger paired with an effect. A trigger is an action, such as a mouse click on a component, a component getting focus, or a component becoming visible. An effect is a visible or audible change to the target component that occurs over a period of time, measured in milliseconds. For example, you can use behaviors to cause a dialog box to bounce slightly when it receives focus, or to slowly fade in when it becomes visible.

Adobe® Flex® supplies a number of standard effects that you can use in your application. However, you also can define custom effects for your specific application needs.

For information on the standard effects, see Using Behaviors.

• About creating a custom effect
• About tween effects
• Writing an effect for a transition
• Creating a custom data effect
• Defining a custom effect trigger