Name
ReferenceError — thrown when reading a variable that does not exist
Availability
JavaScript 1.5; JScript 5.5; ECMAScript v3
Inherits from/Overrides
Inherits from Error
Constructor
new ReferenceError( )
new ReferenceError(message)Arguments
-
message An optional error message that provides details about the exception. If specified, this argument is used as the value for the
messageproperty of the ReferenceError object.
Returns
A newly constructed ReferenceError object. If the
message argument is specified, the Error
object will use it as the value of its message
property; otherwise, it will use an implementation-defined default
string as the value of that property. When the
ReferenceError( ) constructor is called as a
function, without the new operator, it behaves
just as it does when called with the new operator.
Properties
-
message An error message that provides details about the exception. This property holds the string passed to the constructor, or an implementation-defined default string. See Error.message for details.
-
name A string that specifies the type of the exception. All ReferenceError objects inherit the value “ReferenceError” for this property.
Description
An instance of the ReferenceError class is thrown when you attempt to read the value of a variable that does not exist. See Error for details about throwing and catching exceptions.