How to Generate fake data using Faker module in Node.js ?
Faker module is used to generate fake data, not only fake data, infect well organized fake data. Faker module is a widely used NPM module that can generate fake names, addresses, product names, prices with all these you can also generate fake IP addresses, images, and much more using this faker package.
Command to install faker module:
npm install faker
There are some predefined context for which fake data are created for a particular context as mentioned below:
Context(object) | Aspect(method) |
---|---|
name | firstName, lastName, findName, suffix, jobTitle, jobDiscriptor |
address | latitude, longitude, country, state, city, zipCode, streetName |
commerce | product, productName, price, productMaterial |
finance | account, accountName, amount, currencyName, currencyCode, transactionType |
image | people, nature, sports, animals, fashion, food, nightLife |
internet | email, url, ip, mac, password, domainName |
Syntax to get fake data
faker.context.aspect()
Example 1:
javascript
// Program to generate some fake // names with their job titles // Requiring faker module const faker = require( 'faker' ) for (let i=0; i<8; i++){ // Fake first name const firstName = faker.name.firstName() // Fake last name const lastName = faker.name.lastName() // Fake suffix const suffix = faker.name.suffix() // Fake job Title const jobTitle = faker.name.jobTitle() console.log(`${suffix} ${firstName} ${lastName} works as '${jobTitle}' `) } |
Output:
Example 2:
javascript
// Program to generate some fake // products with their details // Requiring faker module const faker = require( 'faker' ) for (let i = 0; i < 8; i++) { // Fake product name const product = faker.commerce.product() // fake price of that product const price = faker.commerce.price() // Fake details const productMaterial = faker.commerce.productMaterial() console.log(`${product} made with ${productMaterial}, price ${price}$`) } |
Output:
Example 3:
javascript
// Program to generate some fake // bank transaction details // Requiring faker module const faker = require( 'faker' ) for (let i = 0; i < 8; i++) { // Fake account type const ac = faker.finance.account() // Fake account name const acName = faker.finance.accountName() // Fake transaction type const tT = faker.finance.transactionType() // Fake amount transaction const amt = faker.finance.amount() console.log(`${acName}, Account No-${ac}, transaction Type-${tT}, Amount-${amt}`) } |
Output:
Example 4:
javascript
// Program to generate some fake // domain name and ip addresses // Requiring faker module const faker = require( 'faker' ) for (let i = 0; i < 8; i++) { // Fake ip address const ip = faker.internet.ip() // Fake domain name const domainName = faker.internet.domainName() console.log(`Domain name -> ${domainName}, ip-address-> ${ip}`) } |
Output:
Reference: NPM faker package