src/frontend/app/ErrorBoundary.tsx


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import React, { Component, type ReactNode } from "react";

interface ErrorBoundaryProps {
  children: ReactNode;
}

interface ErrorBoundaryState {
  hasError: boolean;
  error: Error | null;
}

class ErrorBoundary extends Component<ErrorBoundaryProps, ErrorBoundaryState> {
  constructor(props: ErrorBoundaryProps) {
    super(props);
    this.state = {
      hasError: false,
      error: null,
    };
  }

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

  componentDidCatch(error: Error, errorInfo: React.ErrorInfo) {
    console.error("Uncaught error:", error, errorInfo);
  }

  render() {
    if (this.state.hasError) {
      return (
        <>
          <h1>Something went wrong.</h1>
          <pre>{this.state.error?.stack}</pre>
        </>
      );
    }

    return this.props.children;
  }
}

export default ErrorBoundary;