Error.prototype

The Error.prototype property represents the prototype for the Error constructor.

Description

All Error instances and instances of non-generic errors inherit from Error.prototype. As with all constructor functions, you can use the prototype of the constructor to add properties or methods to all instances created with that constructor.

Properties

Standard properties

Error.prototype.constructor

Specifies the function that created an instance's prototype.

Error.prototype.message

Error message.

Error.prototype.name

Error name.

Vendor-specific extensions

Microsoft

Error.prototype.description

Error description. Similar to message.

Error.prototype.number

Error number.

Mozilla

Error.prototype.fileName

Path to file that raised this error.

Error.prototype.lineNumber

Line number in file that raised this error.

Error.prototype.columnNumber

Column number in line that raised this error.

Error.prototype.stack

Stack trace.

Methods

Error.prototype.toSource()

Returns a string containing the source of the specified Error object; you can use this value to create a new object. Overrides the Object.prototype.toSource() method.

Error.prototype.toString()

Returns a string representing the specified object. Overrides the Object.prototype.toString() method.

Specifications

Specification	Status	Comment
ECMAScript 1st Edition (ECMA-262)	Standard	Initial definition. Implemented in JavaScript 1.1.
ECMAScript 5.1 (ECMA-262) The definition of 'Error' in that specification.	Standard
ECMAScript 2015 (6th Edition, ECMA-262) The definition of 'Error' in that specification.	Standard
ECMAScript 2017 Draft (ECMA-262) The definition of 'Error' in that specification.	Draft

Browser compatibility

See also

• Error
• Object.prototype