Works on Workers

Extensible HTTP server framework (predecessor to Express). Works with httpServerHandler.

💡 Alternative: Hono or itty-router

Error: Unexpected token ':'

import { httpServerHandler } from 'cloudflare:node';
import connect from 'connect';

const app = connect();
app.use((req, res) => {
  res.end('Hello from Connect!');
});

app.listen(3000);
export default httpServerHandler({ port: 3000 });

Node.js web framework. Works on Workers with httpServerHandler from cloudflare:node. Requires nodejs_compat flag.

💡 Alternative: Hono (most Express-like, fastest), itty-router (tiny, simple), Toucan (Sentry-like routing), or workers-router (official Cloudflare routing helper)

Error: Unexpected strict mode reserved word

import { httpServerHandler } from 'cloudflare:node';
import express from 'express';

const app = express();
app.use(express.json());

app.get('/',(req, res) => res.json({ message: 'Express on Workers!' }));
app.post('/echo', (req, res) => res.json({ received: req.body }));

app.listen(3000);
export default httpServerHandler({ port: 3000 });

Express/Connect final handler for ending middleware chains. Works with httpServerHandler - correctly handles 404s and errors.

💡 Alternative: Use Hono or itty-router for error handling

import { httpServerHandler } from 'cloudflare:node';
import { createServer } from 'node:http';
import finalhandler from 'finalhandler';

const server = createServer((req, res) => {
  const done = finalhandler(req, res);
  
  if (req.url === '/') {
    res.writeHead(200, { 'Content-Type': 'application/json' });
    res.end(JSON.stringify({ message: 'Hello!' }));
  } else {
    done(); // 404 for unknown routes
  }
});

server.listen(3000);
export default httpServerHandler({ port: 3000 });

Formidable is a Node.js form parsing library for handling multipart/form-data, especially file uploads, in traditional Node.js HTTP servers (http.createServer). Requires node:os module which is not supported in Workers nodejs_compat (only crypto, fs, path, buffer, stream, events, util, http, https, net, dns, zlib, timers, url, assert, process, diagnostics_channel, async_hooks are supported). Designed for Node.js request/response objects and filesystem-based temporary file storage during upload processing. Workers uses Request/Response objects and has better alternatives for form parsing.

💡 Alternative: Workers Request.formData() API (native multipart/form-data parsing built-in), or busboy (lower-level multipart parser that may work with Workers)

Error: No such module "node:os".

Node.js web framework. Works on Workers with httpServerHandler from cloudflare:node. Requires nodejs_compat flag.

💡 Alternative: hono, itty-router

Error: Unexpected token ':'

import { httpServerHandler } from 'cloudflare:node';
import Koa from 'koa';

const app = new Koa();
app.use(async (ctx) => {
  ctx.body = { message: 'Koa on Workers!' };
});

app.listen(3000);
export default httpServerHandler({ port: 3000 });

Koa body parsing middleware

💡 Alternative: hono, itty-router

Error: Package koa-body needs manual test configuration - do not use generic Object.keys() test

Koa body parsing middleware

💡 Alternative: hono, itty-router

Error: Command failed: npm install npm warn deprecated rollup-plugin-inject@3.0.2: This package has been deprecated and is no longer maintained. Please use @rollup/plugin-inject. npm warn deprecated sourcema

Koa middleware composition

💡 Alternative: hono, itty-router

Error: Package koa-compose needs manual test configuration - do not use generic Object.keys() test

Koa logging middleware

💡 Alternative: hono, itty-router

Error: Package koa-logger needs manual test configuration - do not use generic Object.keys() test

Koa routing middleware

💡 Alternative: hono, itty-router

Error: Unexpected token ':'

Koa static file middleware

💡 Alternative: hono, itty-router

Error: Unexpected token ':'