Cookies Example

You can read and write cookies directly on the edge and action as needed.

Demo

https://edge-functions-cookies.vercel.app

Since you can read cookies on the edge and rewrite the user to a statically generated page, eliminates the need of using getServerSideProps + redirect just to access the cookie, hence improving your site's performance and mantaining the same url.

The magic happens in the middleware.ts file:

import { NextRequest, NextResponse } from 'next/server'

export const config = {
  matcher: '/',
}

export function middleware(req: NextRequest) {
  // Parse the cookie
  const isInBeta = JSON.parse(req.cookies.get('beta') || 'false')

  // Update url pathname
  req.nextUrl.pathname = `/${isInBeta ? 'beta' : 'non-beta'}`

  // Rewrite to url
  return NextResponse.rewrite(req.nextUrl)
}

One-Click Deploy

Deploy the example using Vercel:

Getting Started

Execute create-next-app with npm or Yarn to bootstrap the example:

npx create-next-app --example https://github.com/vercel/examples/tree/main/edge-functions/cookies cookies
# or
yarn create next-app --example https://github.com/vercel/examples/tree/main/edge-functions/cookies cookies

Next, run Next.js in development mode:

npm install
npm run dev

# or

yarn
yarn dev

Deploy it to the cloud with Vercel (Documentation).