How can you access the query in Next.js API when req.query is initially set to undefined?

Is there a way to compare the value of req.query with the cookies on the site, even when req.query is undefined upon initial load? How can this be addressed?

export default async function handler(req, res) {
  const { method } = req;
  const userId = req.query.id; //undefined
  const userCookieId = req.cookies?.uid || req.cookies?.guestId; //undefined
  const authUser = userId === userCookieId;
}

Answer №1

Here's a method I am familiar with

const url = new URL(req.url)
const searchParams = new URLSearchParams(url.search)
const token = searchParams.get('token')

I have only tested this on a next.js app router, so I can't guarantee it will work with your code.

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