InternalError: too much recursion on Firefox

Core Problem

The InternalError: too much recursion error occurs when a function calls itself excessively without a base case, causing the call stack to overflow. In the context of Next.js, this issue can be particularly problematic due to its use of dynamic routing and server-side rendering.

Solution & Analysis

To resolve the InternalError: too much recursion issue in Next.js, we need to identify and fix the recursive function calls that are causing the error.

Using debug middleware

One common solution is to enable debug logging for the App Router. This can help identify issues with recursive function calls.

export default function MyApp({ Component, pageProps }) {
  return (
    <Layout>
      <Component {...pageProps} />
    </Layout>
  )
}

// pages/_app.js
import { NextPage } from 'next';
import App from '../components/App';

const MyApp = ({ Component, pageProps }: NextPage) => {
  // Enable debug logging for the App Router
  const debugMiddleware = (req, res, next) => {
    process.env.DEBUG ? console.log(req.url + ' ' + req.method) : null;
    next();
  };

  return (
    <App>
      <Component {...pageProps} />
    </App>
  );
};

export default MyApp;

// pages/_middleware.js
import { NextApiRequest, NextApiResponse } from 'next';
import { debugMiddleware } from '../_app';

const debugMiddlewareFn = (req: NextApiRequest, res: NextApiResponse) => {
  // Enable debug logging for the App Router
  if (process.env.DEBUG) {
    console.log(req.url + ' ' + req.method);
  }
};

export default debugMiddleware;

Handling recursive function calls

To handle recursive function calls in your code, you can use techniques such as:

• Adding a base case to prevent infinite recursion
• Using memoization or caching to store results of expensive function calls
• Implementing an iterative solution instead of a recursive one

// pages/api/endpoint.js
import { NextApiRequest, NextApiResponse } from 'next';

const endpoint = async (req: NextApiRequest, res: NextApiResponse) => {
  // Handle request and return response
};

export default endpoint;

Conclusion

The InternalError: too much recursion error can be challenging to resolve, but by enabling debug logging for the App Router and handling recursive function calls effectively, you can identify and fix issues causing this error.

Reference

• Source