株式会社オブライト
Web Frontend2026-05-17

Edge Function

Also known as: Edge Functions / エッジ関数 / Edge Runtime

Serverless functions that run on CDN edge nodes geographically close to users, delivering low latency. They use a restricted Edge Runtime (lighter than Node.js), making them ideal for A/B testing, auth checks, and geo-routing.

Overview

Edge Functions run in edge computing environments provided by Vercel, Cloudflare Workers, Deno Deploy, and others. Full Node.js APIs are unavailable, but Web standard APIs (Response, fetch, crypto) work fine. Extremely short cold starts make them ideal for lightweight, per-request processing.

Integration with Next.js

In Next.js, adding 'export const runtime = edge' runs Middleware on the Edge Runtime. Hono is also Edge Runtime compatible — see the Hono × Cloudflare Workers guide for building edge APIs.

Related Columns

Software Dev
Hono × Cloudflare Workers Complete Guide — Build Lightning-Fast Edge APIs Serverlessly [2026]
Hono was born for Cloudflare Workers. Build APIs with sub-5ms cold starts and zero ops costs across 300+ edge locations worldwide. Complete guide covering D1, KV, R2, Workers AI integration, and deployment.
Web Development
Complete Guide to Building Websites with Vercel and Next.js 16 [2026 Edition]
In 2026, building websites with Next.js 16 and Vercel has dramatically evolved with Turbopack's 400% faster dev startup, React Server Components, and v0 AI generation. Learn everything about professional web development starting from $20/month.
Web Development
Hono + Inertia + React Deployment Guide — Cloudflare Workers / Vercel / Bun: Choosing Your Stack and CI/CD [2026]
A practitioner's guide to deploying Hono + Inertia + React in production. Compares Cloudflare Workers, Vercel, Fly.io, Bun on VPS, and Node on ECS; covers SSR, cold start, edge vs region, GitHub Actions, environment variables, and monitoring.

Related Terms

MiddlewareProxyNext.jsHonoStreamingVercelCloudflare

Feel free to contact us

Contact Us