Node HTTP

Node.js is the most popular JavaScript runtime environment, and feTS supports it fully as well with a few lines of code.

This recipe shows how to use feTS with Node.js’ built-in HTTP implementation.

Installation

npmpnpmyarnbun

npm i fets

pnpm add fets

yarn add fets

bun add fets

Example

import { createServer } from 'node:http'
import { createRouter, Response } from 'fets'

const router = createRouter().route({ method: 'GET', path: '/greetings', schemas: { responses: {
  200: { type: 'object', properties: { hello: { type: 'string' } } } } }, handler: () =>
Response.json({ hello: 'world' }) })

createServer(router).listen(3000, () => { console.log('Swagger UI is available at
http://localhost:3000/docs') })

import { createServer } from 'node:http'
import { createRouter, Response, Type } from 'fets'

const router = createRouter().route({
  method: 'GET',
  path: '/greetings',
  schemas: {
    responses: {
      200: Type.Object({
        hello: Type.String()
      })
    }
  },
  handler: () => Response.json({ hello: 'world' })
})

createServer(router).listen(3000, () => {
  console.log('Swagger UI is available at http://localhost:3000/docs')
})

Last updated on March 20, 2026