Adobe® Flex® 4 Language Reference
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flash.events 
UncaughtErrorEvents 
Packageflash.events
Classpublic class UncaughtErrorEvents
InheritanceUncaughtErrorEvents Inheritance EventDispatcher Inheritance Object

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10.1, AIR 2

The UncaughtErrorEvents class provides a way to receive uncaught error events. An instance of this class dispatches an uncaughtError event when a runtime error occurs and the error isn't detected and handled in your code.

Use the following properties to access an UncaughtErrorEvents instance:

  • LoaderInfo.uncaughtErrorEvents: to detect uncaught errors in code defined in the same SWF.
  • Loader.uncaughtErrorEvents: to detect uncaught errors in code defined in the SWF loaded by a Loader object.

To catch an error directly and prevent an uncaught error event, do the following:

  • Use a try..catch block to isolate code that potentially throws a synchronous error
  • When performing an operation that dispatches an event when an error occurs, register a listener for that error event

If the content loaded by a Loader object is an AVM1 (ActionScript 2) SWF file, uncaught errors in the AVM1 SWF file do not result in an uncaughtError event. In addition, JavaScript errors in HTML content loaded in an HTMLLoader object (including a Flex HTML control) do not result in an uncaughtError event.

See also



Public Properties
 PropertyDefined By
 Inheritedconstructor : Object
A reference to the class object or constructor function for a given object instance.
Object
 Inheritedprototype : Object
[static] A reference to the prototype object of a class or function object.
Object
Public Methods
 MethodDefined By
  
Creates an UncaughtErrorEvents instance.
UncaughtErrorEvents
 Inherited
addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registers an event listener object with an EventDispatcher object so that the listener receives notification of an event.
EventDispatcher
 Inherited
Dispatches an event into the event flow.
EventDispatcher
 Inherited
Checks whether the EventDispatcher object has any listeners registered for a specific type of event.
EventDispatcher
 Inherited
Indicates whether an object has a specified property defined.
Object
 Inherited
Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.
Object
 Inherited
Indicates whether the specified property exists and is enumerable.
Object
 Inherited
removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void
Removes a listener from the EventDispatcher object.
EventDispatcher
 Inherited
Sets the availability of a dynamic property for loop operations.
Object
 Inherited
Returns the string representation of this object, formatted according to locale-specific conventions.
Object
 Inherited
Returns the string representation of the specified object.
Object
 Inherited
Returns the primitive value of the specified object.
Object
 Inherited
Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type.
EventDispatcher
Events
 Event Summary Defined By
 Inherited[broadcast event] Dispatched when the Flash Player or AIR application gains operating system focus and becomes active.EventDispatcher
 Inherited[broadcast event] Dispatched when the Flash Player or AIR application operating loses system focus and is becoming inactive.EventDispatcher
  Dispatched when an error occurs and developer code doesn't detect and handle the error.UncaughtErrorEvents
Constructor Detail

UncaughtErrorEvents

()Constructor
public function UncaughtErrorEvents()

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10.1, AIR 2

Creates an UncaughtErrorEvents instance. Developer code shouldn't create UncaughtErrorEvents instances directly. To access an UncaughtErrorEvents object, use one of the following properties:

  • LoaderInfo.uncaughtErrorEvents: to detect uncaught errors in code defined in the same SWF.
  • Loader.uncaughtErrorEvents: to detect uncaught errors in code defined in the SWF loaded by a Loader object.

See also

Event Detail

uncaughtError

Event
Event Object Type: flash.events.UncaughtErrorEvent
property UncaughtErrorEvent.type = flash.events.UncaughtErrorEvent.UNCAUGHT_ERROR

Language Version: ActionScript 3.0
Runtime Versions: Flash Player 10.1, AIR 2

Dispatched when an error occurs and developer code doesn't detect and handle the error.

Defines the value of the type property of an uncaughtError event object.

This event has the following properties:

PropertyValue
bubblestrue
cancelabletrue; cancelling the event prevents the uncaught error dialog from appearing in debugger runtime versions
currentTargetThe object that is actively processing the Event object with an event listener.
errorThe uncaught error.
targetThe LoaderInfo object associated with the SWF where the error happened.
textText error message.