cosmos-explorer/src/Explorer/ErrorBoundary.tsx

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

interface Props {
  children: ReactNode;
}

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

export class ErrorBoundary extends Component<Props, State> {
  public state: State = {
    hasError: false,
    error: null,
  };

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

  public componentDidCatch(error: Error): void {
    console.error("Error caught in boundary:", error);
  }

  public render() {
    if (this.state.hasError) {
      return (
        <div style={{ padding: "20px", color: "red" }}>
          <h2>Something went wrong.</h2>
          <details style={{ whiteSpace: "pre-wrap" }}>{this.state.error && this.state.error.toString()}</details>
        </div>
      );
    }

    return this.props.children;
  }
}