Headers requestAsyncStorage Next.js

Why This Happens

In Next.js, headers() was called outside of a request context. This is one of the most common Next.js errors developers encounter. Understanding the root cause helps you fix it quickly and prevent it from recurring.

The Problem

const h = headers();  // At module level

The Fix

export default function Page() {
  const h = headers();  // Inside component
}

Step-by-Step Fix

1. 1

   Identify the error

   Look at the error message: Error: Invariant: headers() expects to have requestAsyncStorage. This tells you exactly what went wrong.

2. 2

   Find the cause

   Check the stack trace to find which line of your Next.js code triggered this error.

3. 3

   Apply the fix

   Use the corrected code pattern shown above. Test to confirm the error is resolved.