cloudflare-hono

Cloudflare Hono Skill

Build fast, lightweight web applications with Hono on Cloudflare Workers.

When to Use

• Creating web APIs
• Building middleware chains
• Handling routing
• Implementing middleware logic

Critical Rules

App Setup

• Create Hono instance with proper types
• Use generic for environment bindings
• Set up middleware early
• Configure CORS appropriately

Routing

• Use type-safe routing
• Leverage path parameters
• Use HTTP method handlers
• Group related routes

Middleware

• Create reusable middleware
• Type context extensions
• Handle errors in middleware
• Use built-in middleware

TypeScript

• Type environment bindings
• Use generics for variables
• Type request/response properly
• Leverage Hono's type inference

Examples

Good

import { Hono } from 'hono';
import { cors } from 'hono/cors';

interface Bindings {
  KV: KVNamespace;
  DB: D1Database;
}

const app = new Hono<{ Bindings: Bindings }>();

app.use('/*', cors());

app.get('/api/users/:id', async (c) => {
  const id = c.req.param('id');
  const user = await c.env.DB.prepare(
    'SELECT * FROM users WHERE id = ?'
  ).bind(id).first();
  
  if (!user) {
    return c.json({ error: 'Not found' }, 404);
  }
  
  return c.json(user);
});

export default app;

Related

• /cloudflare-workers - CF Workers fundamentals
• /typescript - TypeScript patterns