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ReferenceError

Package | Top Level
Class | public dynamic class ReferenceError
Inheritance | ReferenceError Error Object

Language Version : | ActionScript 3.0

Player Version : | Flash Player 9

A ReferenceError exception is thrown when a reference to an undefined property is attempted on a sealed (nondynamic) object. References to undefined variables will result in ReferenceError exceptions to inform you of potential bugs and help you troubleshoot application code.

However, you can refer to undefined properties of a dynamic class without causing a ReferenceError exception to be thrown. For more information, see the `dynamic` keyword.

View the examples

See also

dynamic keyword
Error handling in ActionScript 3.0
Responding to error events and status

Public Properties
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| Property | Defined By
--- | --- | ---
|  | constructor : Object A reference to the class object or constructor function for a given object instance. | Object
|  | errorID : int [read-only] Contains the reference number associated with the specific error message. | Error
|  | message : String Contains the message associated with the Error object. | Error
|  | name : String Contains the name of the Error object. | Error
|  | prototype : Object [static] A reference to the prototype object of a class or function object. | Object

Public Methods
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| Method | Defined By
--- | --- | ---
|  | ReferenceError(message:String = "") Creates a new ReferenceError object. | ReferenceError
|  | getStackTrace():String Returns the call stack for an error as a string at the time of the error's construction (for the debugger version of Flash Player only). | Error
|  | hasOwnProperty(name:String):Boolean Indicates whether an object has a specified property defined. | Object
|  | isPrototypeOf(theClass:Object):Boolean Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter. | Object
|  | propertyIsEnumerable(name:String):Boolean Indicates whether the specified property exists and is enumerable. | Object
|  | setPropertyIsEnumerable(name:String, isEnum:Boolean = true):void Sets the availability of a dynamic property for loop operations. | Object
|  | toString():String Returns the string "Error" by default or the value contained in Error.message property, if defined. | Error
|  | valueOf():Object Returns the primitive value of the specified object. | Object

Constructor Detail

ReferenceError | () | Constructor

`public function ReferenceError(message:String = "")`

Creates a new ReferenceError object.

Parameters

| `message:String` (default = "``")`` — Contains the message associated with the ReferenceError object.

See also

Error handling in ActionScript 3.0
Responding to error events and status
Examples How to use examples
ReferenceErrorExample.as
The following example shows how a `ReferenceError` exception can be generated and handled within a `try..catch` statement.

    package {
        import flash.display.Sprite;

        public class ReferenceErrorExample extends Sprite {

            public function ReferenceErrorExample() {
                try {
                    this["someMember"] = true;
                }
                catch(e:ReferenceError) {
                    trace(e);
                }
            }
        }
    }

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