React Suspense is a powerful feature that allows developers to handle components that are loading or waiting for data. It simplifies code by providing a declarative way to handle async operations, such as fetching data from APIs or loading lazy components. However, integrating suspense with Redux can be a bit trickier, as Redux operates on a global state and suspense is designed to work at the component level.

In this blog post, we’ll explore how you can integrate suspense with Redux in your React applications. We’ll cover two common scenarios: suspending async actions and suspending components. Let’s dive in!

Suspending async actions

When using Redux, you might have async actions that fetch data from APIs. With suspense, we can suspend these actions and show a loading state until the data is fetched. Here’s an example of how you can achieve this:

import { createResource } from 'redux-suspense';

const getUser = createResource(
  (id) => fetch(`https://api.example.com/users/${id}`).then((response) => response.json())
);

const fetchUser = (id) => async (dispatch) => {
  dispatch({ type: 'FETCH_USER_REQUEST', payload: id });

  try {
    const user = await getUser.read(id);
    dispatch({ type: 'FETCH_USER_SUCCESS', payload: user });
  } catch (error) {
    dispatch({ type: 'FETCH_USER_FAILURE', payload: error.message });
  }
};

In the above code, we define a createResource function from redux-suspense that takes an async function as an argument. This function will handle the suspending and caching of the data. We then create a getUser resource using this function, which fetches user data from the API.

Inside our async action fetchUser, we dispatch the request action, suspending it until the getUser.read method resolves and returns the user data. Once the data is available, we dispatch the success action with the data. If there’s an error, we dispatch the failure action with the error message.

Suspending components

In some cases, you might have lazy-loaded components that need to be suspended until they are fully loaded. Suspense can help with this as well. Here’s an example:

import { lazy, Suspense } from 'react';
import { Provider } from 'react-redux';

import LoadingSpinner from './components/LoadingSpinner';

const LazyComponent = lazy(() => import('./components/LazyComponent'));
const store = createStore(/* your store configuration */);

const App = () => (
  <Provider store={store}>
    <Suspense fallback={<LoadingSpinner />}>
      <LazyComponent />
    </Suspense>
  </Provider>
);

export default App;

In the code snippet above, we have a lazy-loaded component called LazyComponent using the lazy function from React. We wrap this component with the Suspense component and provide a fallback prop with a loading spinner or any other loading indicator you’d like to display while the component is loading.

By integrating suspense with Redux in this way, the state managed by Redux will be aware of the suspended components and adjust accordingly. This allows for a smooth integration of suspense and Redux in your React applications.

Conclusion

Integrating suspense with Redux in React applications enables you to handle async actions and component loading with ease. By following the examples in this blog post, you can take advantage of the power of both suspense and Redux to create better user experiences in your applications.

Remember to use suspense to efficiently handle async operations at the component level and combine it with Redux’s global state management capabilities. With these tools at your disposal, you can build highly performant and responsive React applications.

#references #redux #suspense