Integration with µWebSockets

µWebSockets.js is an HTTP/WebSocket server for Node.js.

Installation

npm i fets uWebSockets.js@uNetworking/uWebSockets.js#semver:^20

pnpm add fets uWebSockets.js@uNetworking/uWebSockets.js#semver:^20

yarn add fets uWebSockets.js@uNetworking/uWebSockets.js#semver:^20

bun add fets uWebSockets.js@uNetworking/uWebSockets.js#semver:^20

Example

JSON SchemaTypeBox

import { createRouter, Response } from 'fets'
import { App, HttpRequest, HttpResponse } from 'uWebSockets.js'

interface ServerContext { req: HttpRequest res: HttpResponse }

const router = createRouter<ServerContext>().route({ method: 'GET', path: '/greetings', schemas: {
responses: { 200: { type: 'object', properties: { message: { type: 'string' } }, required:
['message'], additionalProperties: false } } }, handler: () => Response.json({ message: 'Hello
World!' }) })

App() .any('/\*', router) .listen(3000, () => {
console.log(`Swagger UI is running on http://localhost:3000/docs`) })

import { createRouter, Response, Type } from 'fets'
import { App, HttpRequest, HttpResponse } from 'uWebSockets.js'

interface ServerContext {
  req: HttpRequest
  res: HttpResponse
}

const router = createRouter<ServerContext>().route({
  method: 'GET',
  path: '/greetings',
  schemas: {
    responses: {
      200: Type.Object({
        message: Type.String()
      })
    }
  },
  handler: () => Response.json({ message: 'Hello World!' })
})

App()
  .any('/*', router)
  .listen(3000, () => {
    console.log(`Swagger UI is running on http://localhost:3000/docs`)
  })

Last updated on March 20, 2026