Adding Cookies

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 maintaining the same url.

The magic happens in the middleware.ts file:

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import { NextRequest, NextResponse } from 'next/server'
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export const config = {
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  matcher: '/',
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}
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export default function middleware(req: NextRequest) {
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  // Parse the cookie
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  const isInBeta = JSON.parse(req.cookies.get('beta')?.value || 'false')
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  // Update url pathname
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  req.nextUrl.pathname = `/${isInBeta ? 'beta' : 'non-beta'}`
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  // Rewrite to url
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  return NextResponse.rewrite(req.nextUrl)
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}

How to Use

You can choose from one of the following two methods to use this repository:

One-Click Deploy

Deploy the example using Vercel:

Clone and Deploy

Execute create-next-app with pnpm to bootstrap the example:

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pnpm create next-app --example https://github.com/vercel/examples/tree/main/edge-middleware/cookies cookies

Next, run Next.js in development mode:

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pnpm dev

Deploy it to the cloud with Vercel (Documentation).