exotic-emerald•2d ago

Error boundary

I've seen I should be using suspense and error boundaries to handle errors in my app. Is there an example for how this works?

5 Replies

kapa.ai•2d ago

Hi @Richard. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- Certainly! I'd be happy to provide you with information about using Suspense and Error Boundaries in React to handle errors in your application. React Error Boundaries are components that catch JavaScript errors anywhere in their child component tree, log those errors, and display a fallback UI instead of the component tree that crashed. They work hand-in-hand with Suspense to provide a better error handling experience. Here's a basic example of how to implement an Error Boundary:

class ErrorBoundary extends React.Component {
  constructor(props) {
    super(props);
    this.state = { hasError: false };
  }

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

  componentDidCatch(error, info) {
    console.log(error, info);
  }

  render() {
    if (this.state.hasError) {
      return <h1>Something went wrong.</h1>;
    }
    return this.props.children;
  }
}

class ErrorBoundary extends React.Component {
  constructor(props) {
    super(props);
    this.state = { hasError: false };
  }

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

  componentDidCatch(error, info) {
    console.log(error, info);
  }

  render() {
    if (this.state.hasError) {
      return <h1>Something went wrong.</h1>;
    }
    return this.props.children;
  }
}

You can then use this Error Boundary in combination with Suspense like this:

<ErrorBoundary>
  <Suspense fallback={<Loading />}>
    <MyComponent />
  </Suspense>
</ErrorBoundary>

<ErrorBoundary>
  <Suspense fallback={<Loading />}>
    <MyComponent />
  </Suspense>
</ErrorBoundary>

In this setup, the Error Boundary will catch any errors that occur in MyComponent or its children, while Suspense handles the loading state. For a more advanced implementation, you might consider using the react-error-boundary library, which provides additional features and easier usage with functional components. Here's an example:

import { ErrorBoundary } from "react-error-boundary";

function fallbackRender({ error, resetErrorBoundary }) {
  return (
    <div role="alert">
      <p>Something went wrong:</p>
      <pre style={{ color: "red" }}>{error.message}</pre>
      <button onClick={resetErrorBoundary}>Try again</button>
    </div>
  );
}
<ErrorBoundary fallbackRender={fallbackRender}>
  <Suspense fallback={<div>Loading...</div>}>
    <LazyComponent />
  </Suspense>
</ErrorBoundary>

import { ErrorBoundary } from "react-error-boundary";

function fallbackRender({ error, resetErrorBoundary }) {
  return (
    <div role="alert">
      <p>Something went wrong:</p>
      <pre style={{ color: "red" }}>{error.message}</pre>
      <button onClick={resetErrorBoundary}>Try again</button>
    </div>
  );
}
<ErrorBoundary fallbackRender={fallbackRender}>
  <Suspense fallback={<div>Loading...</div>}>
    <LazyComponent />
  </Suspense>
</ErrorBoundary>

This approach allows you to define a custom fallback UI and provides a reset function to retry after an error occurs. For more detailed information and best practices, you can refer to these resources: - Error Boundaries in React - Handling Errors Gracefully - A Quick Start Guide to React Suspense These articles provide in-depth explanations and additional examples of using Error Boundaries and Suspense in React applications. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2d ago

<@303970537946742784> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

exotic-emeraldOP•2d ago

@kapa.ai How do i integreate this with refine data hooks

kapa.ai•2d ago

Let me check the knowledge base for you again. One moment! :books: ---------------------- To integrate Error Boundaries and Suspense with refine data hooks, you can wrap your components that use refine data hooks with Error Boundary and Suspense components. This approach allows you to handle errors and loading states gracefully in your refine application. Here's an example of how you can integrate Error Boundaries and Suspense with refine data hooks:

import { ErrorBoundary } from "react-error-boundary";
import { useOne } from "@refinedev/core";

const ProductPage = () => {
    const { data, error, isLoading } = useOne<Product>({
        resource: "products",
        id: "1",
        queryOptions: {
            retry: false,
        },
    });

    if (isLoading) {
        return <div>Loading...</div>;
    }

    if (error) {
        throw error; // This will be caught by the ErrorBoundary
    }

    const product = data?.data;

    return (
        <div>
            <h2>Product</h2>
            <p>name: {product?.name}</p>
        </div>
    );
};

const App = () => {
    return (
        <ErrorBoundary
            fallbackRender={({ error }) => (
                <div>
                    <h1>Error</h1>
                    <p>{error.message}</p>
                </div>
            )}
        >
            <Suspense fallback={<div>Loading...</div>}>
                <ProductPage />
            </Suspense>
        </ErrorBoundary>
    );
};

import { ErrorBoundary } from "react-error-boundary";
import { useOne } from "@refinedev/core";

const ProductPage = () => {
    const { data, error, isLoading } = useOne<Product>({
        resource: "products",
        id: "1",
        queryOptions: {
            retry: false,
        },
    });

    if (isLoading) {
        return <div>Loading...</div>;
    }

    if (error) {
        throw error; // This will be caught by the ErrorBoundary
    }

    const product = data?.data;

    return (
        <div>
            <h2>Product</h2>
            <p>name: {product?.name}</p>
        </div>
    );
};

const App = () => {
    return (
        <ErrorBoundary
            fallbackRender={({ error }) => (
                <div>
                    <h1>Error</h1>
                    <p>{error.message}</p>
                </div>
            )}
        >
            <Suspense fallback={<div>Loading...</div>}>
                <ProductPage />
            </Suspense>
        </ErrorBoundary>
    );
};

In this example: 1. We use the useOne hook from refine to fetch data. 2. We wrap our ProductPage component with both ErrorBoundary and Suspense. 3. If an error occurs during data fetching, we throw the error, which will be caught by the ErrorBoundary. 4. The Suspense component handles the loading state. Additionally, refine automatically integrates with the notificationProvider to display errors. If you have set up a notificationProvider, refine will automatically show a notification when an error occurs in data hooks. For more information on error handling in refine, you can refer to the Data Fetching documentation, which explains how refine handles errors in data hooks. Remember that refine expects errors to be extended from HttpError. This consistent error interface makes it easier to handle errors coming from your API. For a more detailed explanation of error handling in refine, including server-side validation and optimistic updates, you can check out the Error Handling documentation. By combining these refine-specific error handling features with React's Error Boundaries and Suspense, you can create a robust error handling system in your refine application. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2d ago

<@303970537946742784> Kapa.ai is still learning and improving, please let me know how I did by reacting below.

Error boundary

Did you find this page helpful?