error-boundary-creator

Error Boundary Creator

Instructions

When implementing error handling:

1. Identify error-prone areas (async operations, third-party integrations)
2. Create appropriate error boundaries
3. Design fallback UIs
4. Set up error reporting

Basic Error Boundary

'use client';

import { Component, ErrorInfo, ReactNode } from 'react';

interface Props {
  children: ReactNode;
  fallback?: ReactNode;
}

interface State {
  hasError: boolean;
  error?: Error;
}

export class ErrorBoundary extends Component<Props, State> {
  constructor(props: Props) {
    super(props);
    this.state = { hasError: false };
  }

  static getDerivedStateFromError(error: Error): State {
    return { hasError: true, error };
  }

  componentDidCatch(error: Error, errorInfo: ErrorInfo) {
    console.error('Error caught by boundary:', error, errorInfo);
    // Send to error reporting service
    // reportError(error, errorInfo);
  }

  render() {
    if (this.state.hasError) {
      return this.props.fallback || <DefaultErrorFallback error={this.state.error} />;
    }

    return this.props.children;
  }
}

function DefaultErrorFallback({ error }: { error?: Error }) {
  return (
    <div role="alert" className="p-4 bg-red-50 border border-red-200 rounded-lg">
      <h2 className="text-lg font-semibold text-red-800">Something went wrong</h2>
      <p className="text-red-600 mt-1">{error?.message || 'An unexpected error occurred'}</p>
      <button
        onClick={() => window.location.reload()}
        className="mt-4 px-4 py-2 bg-red-600 text-white rounded hover:bg-red-700"
      >
        Reload page
      </button>
    </div>
  );
}

Error Boundary with Reset

'use client';

import { Component, ReactNode } from 'react';

interface Props {
  children: ReactNode;
  onReset?: () => void;
}

interface State {
  hasError: boolean;
  error?: Error;
}

export class ResettableErrorBoundary extends Component<Props, State> {
  state: State = { hasError: false };

  static getDerivedStateFromError(error: Error): State {
    return { hasError: true, error };
  }

  reset = () => {
    this.props.onReset?.();
    this.setState({ hasError: false, error: undefined });
  };

  render() {
    if (this.state.hasError) {
      return (
        <div role="alert" className="p-6 text-center">
          <h2 className="text-xl font-bold">Oops!</h2>
          <p className="text-gray-600 mt-2">{this.state.error?.message}</p>
          <button
            onClick={this.reset}
            className="mt-4 px-4 py-2 bg-blue-600 text-white rounded"
          >
            Try again
          </button>
        </div>
      );
    }

    return this.props.children;
  }
}