Faker

Generate massive amounts of fake data in the Browser and Node.js.

Installation

Please replace your faker dependency with @faker-js/faker. This is the official, stable fork of Faker.

npm install @faker-js/faker --save-dev

yarn add @faker-js/faker --dev

pnpm add @faker-js/faker --save-dev

Typescript Support

Types are available via the @types/faker package. You must manually link them using a *.d.ts file, like so:

// faker.d.ts
declare module '@faker-js/faker' {
  import faker from 'faker';
  export default faker;
}

FAQ - What happened to the original faker.js?

This project was originally created and hosted at https://github.com/marak/Faker.js/ - however around 4th Jan, 2022 - the author decided to delete the repository (for unknown reasons).

In the interest of the community, it has been decided that Faker will continue to be maintained here and all help in its development will be appreciated.

Demo

Coming soon!

Usage

Browser

<script src="faker.js" type="text/javascript"></script>
<script>
  var randomName = faker.name.findName(); // Caitlyn Kerluke
  var randomEmail = faker.internet.email(); // Rusty@arne.info
  var randomCard = faker.helpers.createCard(); // random contact card containing many properties
</script>

Node.js

var faker = require('faker');
var randomName = faker.name.findName(); // Rowan Nikolaus
var randomEmail = faker.internet.email(); // Kassandra.Haley@erich.biz
var randomCard = faker.helpers.createCard(); // random contact card containing many properties

API

API Methods

address
- zipCode
- zipCodeByState
- city
- cityPrefix
- citySuffix
- cityName
- streetName
- streetAddress
- streetSuffix
- streetPrefix
- secondaryAddress
- county
- country
- countryCode
- state
- stateAbbr
- latitude
- longitude
- direction
- cardinalDirection
- ordinalDirection
- nearbyGPSCoordinate
- timeZone
animal
- dog
- cat
- snake
- bear
- lion
- cetacean
- horse
- bird
- cow
- fish
- crocodilia
- insect
- rabbit
- type
commerce
- color
- department
- productName
- price
- productAdjective
- productMaterial
- product
- productDescription
company
- suffixes
- companyName
- companySuffix
- catchPhrase
- bs
- catchPhraseAdjective
- catchPhraseDescriptor
- catchPhraseNoun
- bsAdjective
- bsBuzz
- bsNoun
database
- column
- type
- collation
- engine
datatype
- number
- float
- datetime
- string
- uuid
- boolean
- hexaDecimal
- json
- array
date
- past
- future
- between
- betweens
- recent
- soon
- month
- weekday
fake
finance
- account
- accountName
- routingNumber
- mask
- amount
- transactionType
- currencyCode
- currencyName
- currencySymbol
- bitcoinAddress
- litecoinAddress
- creditCardNumber
- creditCardCVV
- ethereumAddress
- iban
- bic
- transactionDescription
git
- branch
- commitEntry
- commitMessage
- commitSha
- shortSha
hacker
- abbreviation
- adjective
- noun
- verb
- ingverb
- phrase
helpers
- randomize
- slugify
- replaceSymbolWithNumber
- replaceSymbols
- replaceCreditCardSymbols
- repeatString
- regexpStyleStringParse
- shuffle
- mustache
- createCard
- contextualCard
- userCard
- createTransaction
image
- image
- avatar
- imageUrl
- abstract
- animals
- business
- cats
- city
- food
- nightlife
- fashion
- people
- nature
- sports
- technics
- transport
- dataUri
- lorempixel
- unsplash
- lorempicsum
internet
- avatar
- email
- exampleEmail
- userName
- protocol
- httpMethod
- url
- domainName
- domainSuffix
- domainWord
- ip
- ipv6
- port
- userAgent
- color
- mac
- password
lorem
- word
- words
- sentence
- slug
- sentences
- paragraph
- paragraphs
- text
- lines
mersenne
- rand
- seed
- seed_array
music
- genre
name
- firstName
- lastName
- middleName
- findName
- jobTitle
- gender
- prefix
- suffix
- title
- jobDescriptor
- jobArea
- jobType
phone
- phoneNumber
- phoneNumberFormat
- phoneFormats
system
- fileName
- commonFileName
- mimeType
- commonFileType
- commonFileExt
- fileType
- fileExt
- directoryPath
- filePath
- semver
time
- recent
unique
vehicle
- vehicle
- manufacturer
- model
- type
- fuel
- vin
- color
- vrm
- bicycle

Faker.fake()

Faker contains a super useful generator method Faker.fake for combining faker API methods using a mustache string format.

Example:

console.log(
  faker.fake('{{name.lastName}}, {{name.firstName}} {{name.suffix}}')
);

This will interpolate the format string with the value of methods name.lastName(), name.firstName(), and name.suffix()

Localization

As of version v2.0.0 Faker has support for multiple localities.

The default language locale is set to English.

Setting a new locale is simple:

// sets locale to de
faker.locale = 'de';

az
ar
cz
de
de_AT
de_CH
en
en_AU
en_AU_ocker
en_BORK
en_CA
en_GB
en_IE
en_IND
en_US
en_ZA
es
es_MX
fa
fi
fr
fr_CA
fr_CH
ge
hy
hr
id_ID
it
ja
ko
nb_NO
ne
nl
nl_BE
pl
pt_BR
pt_PT
ro
ru
sk
sv
tr
uk
vi
zh_CN
zh_TW

Individual Localization Packages

Faker supports incremental loading of locales.

By default, requiring faker will include all locale data.

In a production environment, you may only want to include the locale data for a specific set of locales.

// loads only de locale
var faker = require('faker/locale/de');

Setting a randomness seed

If you want consistent results, you can set your own seed:

faker.seed(123);

var firstRandom = faker.datatype.number();

// Setting the seed again resets the sequence.
faker.seed(123);

var secondRandom = faker.datatype.number();

console.log(firstRandom === secondRandom);

Documentation

Faker is currently in the process of migrating its documentation to Vitepress (the successor of Vuepress).

Developing the docs

# build the Faker library for the browser
# it's used inside of certain routes
npm run browser

npm run docs:dev

Building and serving the docs statically

# build the Faker library for the browser
# it's used inside of certain routes
npm run browser

npm run docs:build # Output docs to /dist
npm run docs:serve # Serve docs from /dist

Deploying Documentation

The website is kindly hosted for free by the Netlify team under their Open Source plan. See the netlify.toml for configuration.

Tests

npm install .
npm run test

You can view a code coverage report generated in coverage/lcov-report/index.html.

Building Faker

Faker uses gulp to automate its build process. Each build operation is a separate task which can be run independently.

Browser Bundle

npm run browser

Building JSDocs

JSDOC v3 HTML API documentation

npm run jsdoc

antfu/faker