next.js: [middlewares] globalThis and globalThis.CryptoKey is missing

What version of Next.js are you using?

12.0.1

What version of Node.js are you using?

v14.18.0

What browser are you using?

Chrome

What operating system are you using?

macOS

How are you deploying your application?

Both Vercel and next dev

Describe the Bug

Testing a universal JOSE (JWT/JWK/etc) library on Middlewares I’ve encountered an issue where the CryptoKey constructor is not exposed via globalThis.CryptoKey.

This is the case for all browsers, Deno, and Cloudflare Workers runtimes but not for Middlewares deployed via vercel or running via next dev.

Not having access to this constructor prohibits my particular library from validating user inputs.

In next dev globalThis.CryptoKey is missing, in vercel.com runtime globalThis is missing completely.

Expected Behavior

globalThis, globalThis.CryptoKey, and CryptoKey are exposed both running via next dev or deployed via vercel.com

To Reproduce

Create a middleware like so, both in development as well as vercel.com, observe the failures are there and also, different.

export default async function middleware(req, ev) {
  try {
    if (typeof CryptoKey === 'undefined') {
      throw new Error('CryptoKey is missing')
    }
    if (typeof globalThis === 'undefined') {
      throw new Error('globalThis is missing')
    }
    if (!globalThis.CryptoKey) {
      throw new Error('globalThis.CryptoKey is missing')
    }
    return new Response(JSON.stringify({}), { status: 200 });
  } catch (err) {
    return new Response(JSON.stringify({ error: err.stack }), { status: 400 });
  }
}