Error Handling in React 19

Robust error handling improves user experience and app reliability. React 19 provides several mechanisms for managing errors in components and hooks.

Error Boundaries

• Use error boundaries to catch errors in child components and display fallback UI.
• Implement with class components or use third-party libraries for function components.

import { ErrorBoundary } from 'react-error-boundary';
function ErrorFallback({ error }) {
  return <div role="alert">Something went wrong: {error.message}</div>;
}
<ErrorBoundary FallbackComponent={ErrorFallback}>
  <MyComponent />
</ErrorBoundary>

Global Error Handling

• Use global error listeners for uncaught errors and promise rejections.
• Log errors to monitoring services (e.g., Sentry, LogRocket).

Async Error Management

• Always handle errors in async functions and API calls.
• Use try/catch blocks in hooks and components.

try {
  await fetchData();
} catch (error) {
  // Handle error, show message
}

User Feedback

• Show clear, actionable error messages to users.
• Avoid exposing sensitive error details.
• Use toast notifications or modals for error alerts.

Logging

• Log errors to external services for monitoring and debugging.
• Include error context (component, props, user actions).

References

• React Error Boundaries
• Sentry for React