23. What is Suspense in React and how do you use it?

Suspense in React is a component that allows you to delay the rendering of a component until its data is ready. Suspense works in conjunction with React.lazy() and asynchronous functions to simplify data loading management.

Using Suspense for dynamic component loading:

1. Import React.lazy() to dynamically load components:

const MyComponent = React.lazy(() => import('./MyComponent'));

2. Wrap the dynamically loaded component in Suspense and set a fallback:

<Suspense fallback={<div>Loading...</div>}>
  <MyComponent />
</Suspense>

Using Suspense for data loading management: Suspense will also integrate with future React features like React Server Components and the use hook for managing asynchronous data loading.

Example of managing data loading:

<Suspense fallback={<div>Loading data...</div>}>
  <DataFetchingComponent />
</Suspense>

Suspense simplifies handling asynchronous component and data loading, improving user experience by providing appropriate fallbacks.