Mozilla Developer Network
Summary
Represents an error when a value is not of the expected type.
Syntax
new TypeError([message[, fileName[, lineNumber]]])
Parameters
- message
- Human-readable description of the error
- fileName
- Non-standard
- The name of the file containing the code that caused the exception
- lineNumber
- Non-standard
- The line number of the code that caused the exception
Description
A TypeError is thrown when an operand or argument passed to a function is incompatible with the type expected by that operator or function.
Properties
For properties available on TypeError instances, see Properties of TypeError instances.
- prototype
- Allows the addition of properties to an TypeError object.
Methods
For methods available on TypeError instances, see Methods of TypeError instances.
The global TypeError contains no methods of its own, however, it does inherit some methods through the prototype chain.
Methods inherited from Object.prototype
__defineGetter__, __defineSetter__, hasOwnProperty, isPrototypeOf, __lookupGetter__, __lookupSetter__, __noSuchMethod__, propertyIsEnumerable, unwatch, watch
__defineGetter__, __defineSetter__, hasOwnProperty, isPrototypeOf, __lookupGetter__, __lookupSetter__, __noSuchMethod__, propertyIsEnumerable, unwatch, watch
TypeError instances
All TypeError instances inherit from TypeError.prototype. You can use the prototype to add properties or methods to all instances.
Properties
- constructor
- Specifies the function that created an instance's prototype.
- name
- Error name.
Note: Although ECMA-262 specifies that
TypeErrorTypeError should provide its own message property, in SpiderMonkey, it inherits Error.prototype.message.Methods
- constructor
- Specifies the function that created an instance's prototype.
- name
- Error name.
Note: Although ECMA-262 specifies that
TypeErrorTypeError should provide its own message property, in SpiderMonkey, it inherits Error.prototype.message.