@vercel/h3

What is @vercel/h3?

@vercel/h3 is a minimalistic HTTP framework for building web applications and APIs. It is designed to be lightweight and fast, making it suitable for serverless environments and edge computing.

What are @vercel/h3's main functionalities?

Creating a basic HTTP server

This code demonstrates how to create a basic HTTP server using @vercel/h3. The server listens on port 3000 and responds with 'Hello, world!' to any incoming request.

const { createServer } = require('@vercel/h3');

const app = createServer((req, res) => {
  res.end('Hello, world!');
});

app.listen(3000, () => {
  console.log('Server is running on http://localhost:3000');
});

Handling JSON requests and responses

This example shows how to handle JSON requests and send JSON responses using @vercel/h3. The server reads a JSON body from the request, processes it, and sends a JSON response.

const { createServer, json } = require('@vercel/h3');

const app = createServer(async (req, res) => {
  const body = await json(req);
  res.setHeader('Content-Type', 'application/json');
  res.end(JSON.stringify({ message: 'Hello, ' + body.name }));
});

app.listen(3000, () => {
  console.log('Server is running on http://localhost:3000');
});

Middleware support

This code demonstrates how to use middleware in @vercel/h3. A simple logger middleware is created and applied to the server, logging each request's method and URL.

const { createServer, use } = require('@vercel/h3');

const logger = (req, res, next) => {
  console.log(`${req.method} ${req.url}`);
  next();
};

const app = createServer();

use(app, logger);

app.use((req, res) => {
  res.end('Hello, world!');
});

app.listen(3000, () => {
  console.log('Server is running on http://localhost:3000');
});

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koa

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README

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