<AsyncBoundary />

Handles loading and error conditions of Suspense.

In React 18, this will create a concurrent split, and in 16 and 17 it will show loading fallbacks. If there is an irrecoverable API error, it will show an error fallback.

tip

Learn more about boundary placement by learning how to co-locate data dependencies

Usage

import React from 'react';
import { AsyncBoundary } from '@rest-hooks/react';

export default function MyPage() {
  return (
    <AsyncBoundary>
      <SuspendingComponent />
    </AsyncBoundary>
  );
}

function SuspendingComponent() {
  const data = useSuspense(MyEndpoint);

  return <div>{data.text}</div>
}

Props

interface BoundaryProps {
  children: React.ReactNode;
  fallback?: React.ReactNode;
  errorComponent?: React.ComponentType<{
    error: NetworkError;
  }>;
}

fallback

Any renderable (React Node) element to show when loading

errorComponent

Component to handle caught errors

Custom fallback example

import React from 'react';
import { CacheProvider, AsyncBoundary, NetworkError } from '@rest-hooks/react';

function ErrorPage({ error }: { error: NetworkError }) {
  return (
    <div>
      {error.status} {error.response && error.response.statusText}
    </div>
  );
}

export default function App() {
  return (
    <CacheProvider>
      <AsyncBoundary fallback="loading" errorComponent={ErrorPage}>
        <Router />
      </AsyncBoundary>
    </CacheProvider>
  );
}

Note: Once <AsyncBoundary /> catches an error it will only render the fallback until it is remounted. To get around this you'll likely want to place the boundary at locations that will cause remounts when the error should be cleared. This is usually below the route itself.