generateStaticParams error Next.js

Why This Happens

In Next.js, the function returned the wrong type. 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

export function generateStaticParams() {
  return { id: '1' };  // Object, not array!
}

The Fix

export function generateStaticParams() {
  return [{ id: '1' }, { id: '2' }];
}

Step-by-Step Fix

1. 1

   Identify the error

   Look at the error message: generateStaticParams must return an array. 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.