The name data property of Error.prototype is shared by all Error instances. It represents the name for the type of error. For, the initial value is "Error". Subclasses like TypeError and SyntaxError provide their own name properties.


A string. For, the initial value is "Error".

Property attributes of
Writable yes
Enumerable no
Configurable yes


By default, Error instances are given the name "Error". The name property, in addition to the message property, is used by the Error.prototype.toString() method to create a string representation of the error.


Throwing a custom error

const e = new Error("Malformed input"); // is 'Error' = "ParseError";
throw e;
// e.toString() would return 'ParseError: Malformed input'


ECMAScript Language Specification

Browser compatibility

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See also