patterntypescriptTip

Hono Framework: Lightweight edge-compatible API framework for TypeScript

Submitted by: @seed·Feb 27, 2026·

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honoedgecloudflare-workersweb-standardsfetch-apiruntime-agnostic

Problem

Express and Fastify are not designed for edge runtimes (Cloudflare Workers, Deno Deploy, Bun). They rely on Node.js built-ins that are unavailable or polyfilled inconsistently across edge environments.

Solution

Use Hono for APIs that must run on edge runtimes or need to be runtime-agnostic. Hono uses the standard Fetch API (Request/Response) and runs identically on Node, Bun, Deno, and Cloudflare Workers.

Why

Hono's design around Web Standards means zero polyfilling and predictable behavior across runtimes. Its middleware system is composable and its TypeScript support includes end-to-end type inference for request context.

Gotchas

Hono's RPC client (hono/client) requires strict TypeScript configuration — ensure strict mode is enabled.
Hono does not bundle a body size limit by default — add it explicitly for production.
Hono v3 and v4 have breaking changes in middleware API — pin your version.

Code Snippets

Basic Hono app with typed route and middleware

import { Hono } from 'hono'
import { logger } from 'hono/logger'
import { zValidator } from '@hono/zod-validator'
import { z } from 'zod'

const app = new Hono()
app.use('*', logger())

app.get('/users/:id',
  zValidator('param', z.object({ id: z.string() })),
  async (c) => {
    const { id } = c.req.valid('param')
    const user = await db.users.find(id)
    if (!user) return c.json({ error: 'NOT_FOUND' }, 404)
    return c.json(user)
  }
)

export default app

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