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makeerror (1.0.12)

Published 2026-02-24 14:01:09 +00:00 by atheaadmin

Installation

Setup this registry in your project .npmrc file:

registry=

To install the package using npm, run the following command:

npm install makeerror@1.0.12

or add it to the package.json file:

"makeerror": "1.0.12"

For more information on the npm registry, see the documentation.

About this package

makeerror

A library to make errors.

Basics

Makes an Error constructor function with the signature below. All arguments are optional, and if the first argument is not a String, it will be assumed to be data:

function(message, data)

You'll typically do something like:

var makeError = require('makeerror')
var UnknownFileTypeError = makeError(
  'UnknownFileTypeError',
  'The specified type is not known.'
)
var er = UnknownFileTypeError()

er will have a prototype chain that ensures:

er instanceof UnknownFileTypeError
er instanceof Error

Templatized Error Messages

There is support for simple string substitutions like:

var makeError = require('makeerror')
var UnknownFileTypeError = makeError(
  'UnknownFileTypeError',
  'The specified type "{type}" is not known.'
)
var er = UnknownFileTypeError({ type: 'bmp' })

Now er.message or er.toString() will return 'The specified type "bmp" is not known.'.

Prototype Hierarchies

You can create simple hierarchies as well using the prototype chain:

var makeError = require('makeerror')
var ParentError = makeError('ParentError')
var ChildError = makeError(
  'ChildError',
  'The child error.',
  { proto: ParentError() }
)
var er = ChildError()

er will have a prototype chain that ensures:

er instanceof ChildError
er instanceof ParentError
er instanceof Error

Dependencies

Dependencies

ID	Version
tmpl	1.0.5

Development Dependencies

ID	Version
mocha	9.1.3

Details

npm

2026-02-24 14:01:09 +00:00

0

Naitik Shah

Project Site

BSD-3-Clause

latest

2.5 KiB

Assets (1)

makeerror-1.0.12.tgz 2.5 KiB

Versions (1) View all

1.0.12 2026-02-24