Since many applications can run without building the logic to handle errors, developers are tempted to postpone building error handling into their applications. However, without error handling, an application may easily stall or frustrate the user if something doesn't work as expected. ActionScript 2.0 has an Error class that allows you to build logic into custom functions to throw an exception with a specific message. Because error handling is critical for making a user-friendly application, ActionScript 3.0 includes an expanded architecture for catching errors.

Subtopics

• ActionScript 3.0 error-handling elements
• Error-handling strategies