How to Use Batching Suspense Boundaries for SSR in React

In React, using batching suspense boundaries can make your server-side rendering (SSR) faster and smoother. By grouping updates, you can reduce loading times and improve the user experience. In this article, we will explain how to set up these boundaries and why they are helpful for your projects.

What Are Batching Suspense Boundaries?

Let’s break this down. Batching is the process of grouping multiple updates to make fewer renders. This means that when several state changes happen, React can work on them all at once instead of handling them one-by-one. This saves time and makes your app feel quicker.

Now, suspense boundaries help manage loading states when fetching data. When you use a suspense boundary, you can wrap components that need data in a special way. This allows React to pause rendering until the data is ready, which leads to a smoother experience for users.

Why Use Batching Suspense Boundaries?

Here are several reasons why you should consider using batching suspense boundaries:

Faster Load Times: By grouping updates, your app can load faster.
Smoother User Experience: Users won’t see data loading screens as often, making the app feel more responsive.
Easier State Management: Managing the state of your app becomes simpler when you use boundaries.

How to Set Up Batching Suspense Boundaries

Now that we know the benefits, let’s look at how to set it all up. We will go step-by-step through creating a simple React app that uses batching and suspense.

1. Create a New React App

Start by creating a new React app if you don’t have one already. You can do this easily using Create React App.

npx create-react-app my-app

2. Install the Required Packages

Next, you'll need to install any packages that you might want to use for data fetching. A popular choice is Axios.

npm install axios

3. Set Up Your Component

Let’s create a component that fetches data and uses a suspense boundary. For this example, we will create a simple user list.

import React, { Suspense } from 'react';
import axios from 'axios';

const fetchUsers = async () => {
    const response = await axios.get('https://jsonplaceholder.typicode.com/users');
    return response.data;
};

const UserList = React.lazy(() => {
    return fetchUsers().then(users => {
        return () => (
            
                {users.map(user => (
                    {user.name}
                ))}
            
        );
    });
});

const App = () => (
    
        User List
        Loading users...}>


);

export default App;

4. Using Batching

To make sure updates are batched, you can use the `startTransition` API from React. This helps you group updates into a single render pass.

import { startTransition } from 'react';

const App = () => {
    const [users, setUsers] = React.useState([]);
    
    const loadUsers = () => {
        startTransition(() => {
            fetchUsers().then(data => {
                setUsers(data);
            });
        });
    };

    return (
        
            User List
            
            Loading users...}>

Conclusion

In summary, batching suspense boundaries can greatly improve your React app’s server-side rendering performance. By grouping updates and managing data fetching with suspense, users can enjoy a fast and smooth experience. Remember to experiment with these techniques to see how they can make your projects better.

For more information on React and SSR, check out the official React documentation. Happy coding!