FG
💻 Software🌐 Web & Full-StackVercel

Minified React Errors in production

Fresh5 days ago
Mar 14, 20260 views
Confidence Score84%
84%

Problem

Verify canary release - [X] I verified that the issue exists in the latest Next.js canary release Provide environment information [code block] Which area(s) of Next.js are affected? (leave empty if unsure) App directory (appDir: true) Link to the code that reproduces this issue or a replay of the bug https://github.com/gaurishhs/Portfolio To Reproduce [code block] Describe the Bug I'm using `next-themes` along with app directory and i get these Minified react errors in the production deployment only on Vercel. These errors are not there during development mode or if i use `vc deploy` Expected Behavior No such errors Which browser are you using? (if relevant) Brave Browser How are you deploying your application? (if relevant) Vercel

Unverified for your environment

Select your OS to check compatibility.

1 Fix

Canonical Fix
Unverified Fix
New Fix – Awaiting Verification

Resolve Minified React Errors in Production with Next.js and Vercel

Medium Risk

The minified React errors in production are likely caused by mismatches in server-side rendering (SSR) and client-side rendering (CSR) when using the `next-themes` package in conjunction with the app directory. This can occur if the theme context is not properly initialized or if there are discrepancies between the server-rendered output and the client-rendered output.

Awaiting Verification

Be the first to verify this fix

  1. 1

    Ensure Proper Theme Initialization

    Make sure that the theme context is initialized correctly in your app. This can be done by wrapping your application with the ThemeProvider from `next-themes` in the `_app.js` or `layout.js` file. This ensures that the theme is available during both SSR and CSR.

    javascript
    import { ThemeProvider } from 'next-themes';

function MyApp({ Component, pageProps }) {
  return (
    <ThemeProvider>
      <Component {...pageProps} />
    </ThemeProvider>
  );
}

export default MyApp;
  2. 2

    Check for Hydration Issues

    Inspect your components to ensure they do not rely on browser-specific APIs during SSR. Use `useEffect` to access browser APIs after the component mounts, preventing discrepancies between SSR and CSR.

    javascript
    import { useEffect } from 'react';

function MyComponent() {
  useEffect(() => {
    // Browser-specific code here
  }, []);
  return <div>Your content here</div>;
}
  3. 3

    Update Dependencies

    Ensure that all dependencies, including `next-themes`, are up to date. Run `npm update` or `yarn upgrade` to get the latest versions, which may contain bug fixes related to SSR and CSR.

    bash
    npm update next-themes
  4. 4

    Test in Production Environment

    After making the above changes, deploy your application to Vercel and monitor the production logs for any remaining errors. Use the Vercel dashboard to check for any SSR warnings or errors.

    bash
    vercel --prod
  5. 5

    Check for Console Warnings

    Open the browser console in production and look for any warnings or errors related to React. This can provide additional context on what might still be causing issues.

    javascript
    console.log('Check for React warnings');

Validation

Confirm that the minified React errors no longer appear in the production build on Vercel. Test the application in various browsers, including Brave, to ensure consistent behavior. Additionally, check the console for any warnings or errors during runtime.

Sign in to verify this fix

Environment

Submitted by

AC

Alex Chen

2450 rep

Tags

nextjsreactssrplease-add-a-complete-reproduction