React Lesson - Suspense and Concurrent Rendering

Suspense and Concurrent Rendering

Learn how to manage asynchronous rendering with React’s Suspense and Concurrent Rendering features.

1. What is Suspense?

Suspense is a React feature that allows you to handle asynchronous operations declaratively. It is particularly useful for managing loading states during data fetching or lazy component loading.

2. Example: Lazy Loading Components with Suspense

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

const LazyComponent = lazy(() => import('./LazyComponent'));

function App() {
    return (
        
            Loading...}>

); } export default App;

Explanation: The code above uses React.lazy to dynamically load a component and Suspense to display a fallback UI during loading.

3. What is Concurrent Rendering?

Concurrent Rendering is a React feature that improves the rendering process by breaking tasks into smaller units. It allows React to interrupt rendering to handle more urgent updates, resulting in smoother user interactions.

4. Benefits of Suspense and Concurrent Rendering

Improved User Experience: Reduces blocking operations, making apps feel more responsive.
Seamless Loading: Handles loading states gracefully with Suspense.
Efficient Rendering: Optimizes rendering for performance-critical applications.

5. Best Practices

Fallback UI: Always provide meaningful fallback UI for Suspense.
Combine with Data Fetching: Use libraries like React Query or SWR to integrate Suspense with data fetching.
Test Thoroughly: Ensure your application behaves predictably in both concurrent and blocking modes.

1. What is Suspense?

2. Example: Lazy Loading Components with Suspense

3. What is Concurrent Rendering?

4. Benefits of Suspense and Concurrent Rendering

5. Best Practices

Additional Resources