@prexjs/prex

Fast, unopinionated, and modular web framework for Node.js built with modern TypeScript.

@prexjs/prex is a lightweight, high-performance web framework for Node.js. Architected as a modular TypeScript suite, it delivers familiar Express-compatible routing and middleware mechanics with native asynchronous promise resolution, built-in body parsing, static file serving, and CORS support.

Features

• Express-Compatible API: Frictionless migration with familiar application, request, response, and router primitives.
• Async & Promise-First: Route handlers naturally await promises with automated rejection forwarding to error middleware.
• Modular Monorepo Foundation: Every component—from ETag calculation to body parsers and content negotiation—is cleanly decoupled into its own independent package.
• Built-In Essentials: Direct access to prex.json(), prex.urlencoded(), prex.raw(), prex.text(), prex.static(), and prex.cors().
• First-Class TypeScript: Exhaustive type definitions for request parameters, response locals, middleware handlers, and application settings.
• Dual CJS & ESM Support: Ready for ES Modules (import) and CommonJS (require).

Installation

Install using your preferred package manager:

# npm
npm install @prexjs/prex

# pnpm
pnpm add @prexjs/prex

# Yarn
yarn add @prexjs/prex

# Bun
bun add @prexjs/prex

Quick start

import prex from '@prexjs/prex';

const app = prex();

// Middleware
app.use(prex.json());
app.use(prex.cors());

// Route definition
app.get('/api/users/:id', async (req, res) => {
  const userId = req.params.id;
  res.json({ id: userId, name: 'Alice', active: true });
});

// Static assets
app.use('/static', prex.static('public'));

// Start server
app.listen(3000, () => {
  console.log('Prex server running at http://localhost:3000');
});

Core Modules & Exports

| Export | Description | Package Source | |---|---|---| | prex() / createApplication() | Creates an application instance | @prexjs/application | | prex.Router / Router | Modular route dispatcher | @prexjs/router | | prex.json() | JSON request body parser | @prexjs/body-parser | | prex.urlencoded() | URL-encoded form parser | @prexjs/body-parser | | prex.raw() | Raw buffer body parser | @prexjs/body-parser | | prex.text() | Text body parser | @prexjs/body-parser | | prex.static() | Static file streaming middleware | @prexjs/serve-static | | prex.cors() | Cross-Origin Resource Sharing | @prexjs/cors | | prex.request | HTTP Request prototype | @prexjs/request | | prex.response | HTTP Response prototype | @prexjs/response |

Compatibility

• Node.js >= 18.0.0
• Supports both ESM and CommonJS
• TypeScript 5.0+

Ecosystem

The @prexjs monorepo consists of 50+ focused, highly optimized utilities including:

• @prexjs/rate-limit: Endpoint rate limiting.
• @prexjs/session: Cookie-based session management.
• @prexjs/http-errors: Standardized HTTP errors.
• @prexjs/accepts: Content negotiation.

License

MIT