Cursor ui

React Error Boundary Missing After Cleanup

After Cursor cleaned up React components, error boundaries were removed. When a component throws an error, the entire application crashes instead of showing a graceful error message.

Error handling is now missing from critical parts of the app.

Error Messages You Might See

Error: Uncaught ReferenceError White screen of death Application crashed Uncaught error
Error: Uncaught ReferenceErrorWhite screen of deathApplication crashedUncaught error

Common Causes

  1. Error boundary component deleted during cleanup
  2. Error boundary not wrapping important sections
  3. Error boundary componentDidCatch removed
  4. No fallback UI specified in error boundary
  5. Only class components can be error boundaries (functional hooks not yet)

How to Fix It

Create class Error Boundary: componentDidCatch(error, info) { this.setState({hasError: true}); }. Wrap sections: <ErrorBoundary><App /></ErrorBoundary>. Show fallback: this.state.hasError ? <Error /> : children. Log errors to service.

Real developers can help you.

Stanislav Prigodich Stanislav Prigodich 15+ years building iOS and web apps at startups and enterprise companies. I want to use that experience to help builders ship real products - when something breaks, I'm here to fix it. Simon A. Simon A. I'm a backend developer building APIs, emulators, and interactive game systems. Professionally, I've developed Java/Spring reporting solutions, managed relational and NoSQL databases, and implemented CI/CD workflows. David Olverson David Olverson Solo dev shipping production apps with AI-assisted development. I specialize in rescuing broken Lovable/Bolt/Cursor builds and taking them to production. 10+ apps shipped including SaaS CRMs, gaming platforms, real estate tools, and Discord bots. Stack: Next.js 16, TypeScript, Tailwind CSS, FastAPI, PostgreSQL, Prisma. I use Claude Code with 50+ custom skills for rapid delivery. Average turnaround: 2-4 weeks from broken prototype to production. Kingsley Omage Kingsley Omage Fullstack software engineer passionate about AI Agents, blockchain, LLMs. Rudra Bhikadiya Rudra Bhikadiya I build and fix web apps across Next.js, Node.js, and DBs. Comfortable jumping into messy code, broken APIs, and mysterious bugs. If your project works in theory but not in reality, I help close that gap. rayush33 rayush33 JavaScript (React.js, React Native, Node.js) Developer with demonstrated industry experience of 4+ years, actively looking for opportunities to hone my skills as well as help small-scale business owners with solutions to technical problems Dor Yaloz Dor Yaloz SW engineer with 6+ years of experience, I worked with React/Node/Python did projects with React+Capacitor.js for ios Supabase expert Antriksh Narang Antriksh Narang 5 years+ Experienced Dev (Specially in Web Development), can help in python, javascript, react, next.js and full stack web dev technologies. Tejas Chokhawala Tejas Chokhawala Full-stack engineer with 5 years experience building production web apps using React, Next.js and TypeScript. Focused on performance, clean architecture and shipping fast. Experienced with Supabase/Postgres backends, Stripe billing, and building AI-assisted developer tools. Yovel Cohen Yovel Cohen I got a lot of experience in building Long-horizon AI Agents in production, Backend apps that scale to millions of users and frontend knowledge as well.

You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.

Get Help

Frequently Asked Questions

What can error boundaries catch?

Rendering errors, lifecycle errors. NOT event handlers or async code. Use try/catch for those.

How do I test error boundaries?

Create test component that throws. Wrap in error boundary. Verify fallback UI renders.

Related Cursor Issues

Can't fix it yourself?
Real developers can help.

You don't need to be technical. Just describe what's wrong and a verified developer will handle the rest.

Get Help