react error boundary example

default-error-fallback.tsx

import React from "react";

export const DefaultErrorFallback = () => {
  return <span>Oops! Failed to load...</span>;
};

error-boundary.ts

import React from "react";
import { DefaultErrorFallback } from "./default-error-fallback";

export interface ErrorBoundaryFallbackProps {
  error: Error;
}

export interface ErrorBoundaryProps {
  children: React.ReactNode;
  fallback: React.FunctionComponent<ErrorBoundaryFallbackProps>;
}

export interface ErrorBoundaryState {
  error: Error | null;
}

export class ErrorBoundary extends React.Component<
  ErrorBoundaryProps,
  ErrorBoundaryState
> {
  static defaultProps = {
    fallback: DefaultErrorFallback,
  };

  constructor(props: ErrorBoundaryProps) {
    super(props);
    this.state = {
      error: null,
    };
  }

  static getDerivedStateFromError = (error: Error) => {
    return { error };
  };

  componentDidCatch = (error: Error, errorInfo: React.ErrorInfo) => {
    console.error(error, errorInfo);
  };

  render = () => {
    const { error } = this.state;

    if (error === null) return this.props.children;

    return this.props.fallback({
      error,
    });
  };
}