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
Common Causes
- Error boundary component deleted during cleanup
- Error boundary not wrapping important sections
- Error boundary componentDidCatch removed
- No fallback UI specified in error boundary
- 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.
AUXLE
I am a Full Stack Developer experienced in building Websites, Web apps and Cross Platform Mobile Apps for Startups and Companies.
Jacek Rozanski
Senior PHP/Symfony developer and DevOps engineer with 20+ years of professional experience, running opcode.pl (web development agency, est. 2004).
Day job: I'm the sole backend developer at merketing company where I own and maintain 11 PHP/Symfony microservices on AWS (ECS Fargate, RDS, S3, CloudFront), handle the full CI/CD pipeline (Bitbucket Pipelines, Docker), and manage monitoring with Sentry and CloudWatch. These services handle high request volumes in production every month.
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I worked with React/Node/Python
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Supabase expert
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Milan Surelia
Milan Surelia is a Mobile App Developer with 5+ years of experience crafting scalable, cross-platform apps at 7Span and Meticha. At 7Span, he engineers feature-rich Flutter apps with smooth performance and modern UI. As the Co-Founder of Meticha, he builds open-source tools and developer-focused products that solve real-world problems.
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🎯 Revamped the Vepaar app into Vepaar Store & CRM with a 2x performance boost and smoother UX.
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Milan is always happy to connect, work on new ideas, and explore the latest in technology.
Victor Denisov
Developer
Krishna Sai Kuncha
Experienced Professional Full stack Developer with 8+ years of experience across react, python, js, ts, golang and react-native. Developed inhouse websearch tooling for AI before websearch was solved : )
Anthony Akpan
Developer with 8 years of experience building softwares fro startups
zipking
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Get HelpFrequently 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.