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TypeError

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Resumen

El objeto TypeError representa un error cuando un valor no es del tipo esperado.

Sintaxis

new TypeError([message[, fileName[, lineNumber]]])

Parámetros

message
Opcional. Descripción legible del error. 
fileName
Opcional. El nombre del archivo que contiene el código dónde se genera la excepción.
lineNumber
Opcional. El número de linea del código que causa la excepción. 

Descripción

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

TypeError.prototype
Allows the addition of properties to a TypeError object.

Methods

The global TypeError contains no methods of its own, however, it does inherit some methods through the prototype chain.

TypeError instances

Properties

TypeError.prototype.constructor
Specifies the function that created an instance's prototype.
TypeError.prototype.message
Error message. Although ECMA-262 specifies that TypeError should provide its own message property, in SpiderMonkey, it inherits Error.prototype.message.
TypeError.prototype.name
Error name. Inherited from Error.
TypeError.prototype.fileName
Path to file that raised this error. Inherited from Error.
TypeError.prototype.lineNumber
Line number in file that raised this error. Inherited from Error.
TypeError.prototype.columnNumber
Column number in line that raised this error. Inherited from Error.
TypeError.prototype.stack
Stack trace. Inherited from Error.

Methods

Although the TypeError prototype object does not contain any methods of its own, TypeError instances do inherit some methods through the prototype chain.

Examples

Example: Catch an TypeError

try {
  null.f();
} catch (e) {
  console.log(e instanceof TypeError); // true
  console.log(e.message);              // "null has no properties"
  console.log(e.name);                 // "TypeError"
  console.log(e.fileName);             // "Scratchpad/1"
  console.log(e.lineNumber);           // 2
  console.log(e.columnNumber);         // 2
  console.log(e.stack);                // "@Scratchpad/2:2:3\n"
}

Example: Create an TypeError

try {
  throw new TypeError('Hello', "someFile.js", 10);
} catch (e) {
  console.log(e instanceof TypeError); // true
  console.log(e.message);              // "Hello"
  console.log(e.name);                 // "TypeError"
  console.log(e.fileName);             // "someFile.js"
  console.log(e.lineNumber);           // 10
  console.log(e.columnNumber);         // 0
  console.log(e.stack);                // "@Scratchpad/2:2:9\n"
}

Specifications

Specification Status Comment
ECMAScript 3rd Edition. Standard Initial definition.
ECMAScript 5.1 (ECMA-262)
The definition of 'TypeError' in that specification.
Standard  
ECMAScript 6 (ECMA-262)
The definition of 'TypeError' in that specification.
Release Candidate  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) (Yes) (Yes) (Yes)
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)

See also

Etiquetas y colaboradores del documento

 Colaboradores en esta página: jpmelnik
 Última actualización por: jpmelnik,