Why we use React lazy?

Why we use React lazy?

Using React. lazy() makes it easy to create components that are loaded using dynamic import() but rendered like regular components. This automatically causes the bundle containing the component to load when the component is rendered.

What is React loadable?

React Loadable is a library by @jamiebuilds that makes it easy to implement code splitting in React and that embraces React’s component model. It accomplish its magic using dynamic imports and webpack automatically splits dynamic imports into separate chunks when bundling.

Is React suspense ready?

Suspense is not a data fetching library. It’s a mechanism for data fetching libraries to communicate to React that the data a component is reading is not ready yet. React can then wait for it to be ready and update the UI. At Facebook, we use Relay and its new Suspense integration.

What is the difference between code splitting and lazy loading?

The answer is easy — lazy loading and code splitting. As the name suggests lazy loading is a process of loading parts (chunks) of your application lazily. In other words — loading them only when we really need them. Code splitting is just a process of splitting the app into this lazily loaded chunks.

Should I always use React lazy?

2 Answers. No, for every component it no needed. It make sense to use for each layout or page. A good place to start is with routes.

When should I use lazy loading?

When you SHOULD use lazy load:

1. Most of your images are below the fold, at least a few scroll-clicks from the top of the site.
2. You’ve got huge images, and no CDN.
3. You’ve got many images, and no CDN.
4. Images aren’t integral to your user experience.
5. Using it for SCRIPTS, not images.
6. Your web-server is really weak.

How do you use lazy load react component?

lazy(() => import(‘./OtherComponent’)); This will automatically load the bundle containing the OtherComponent when this component is first rendered. React. lazy takes a function that must call a dynamic import() .

How do I use lazy loading in react JS?

lazy function takes a promise based function and returns it.

1. export your components default (here our CustomComponent). That library does not support named exports yet.
2. Call const LazyLoadedComponent = React.lazy(() => import(‘./custom-component.js’)
3. Use

Is React lazy experimental?

Let’s talk about Suspense itself. Kingsley Silas provides a thorough overview of it, but the first thing to note is that it’s still an experimental API. That means — and React’s docs say the same — not to lean on it yet for production-ready work.

Is React lazy stable?

React Suspense goes hand-in-hand with the scary sounding Concurrent Mode. In this article we are not going to talk about that one, as it is still in its infancy and not yet stable. However, you could start using React Suspense for one huge thing already: lazy loading components via code splitting 🎉.

How does react lazy work?

In essence, lazy loading means that a component or a part of code must get loaded when it is required. It is also referred to as code splitting and data fetching . Talking about React specifically, it bundles the complete code and deploys all of it at the same time.

What is lazy loading in React React?

React has two features that make it very easy to apply code-splitting and lazy loading to React components: React.lazy() and React.Suspense. React.lazy() is a function that enables you to render a dynamic import as a regular component.

Should react loadable be used anymore?

No, React Loadable should not be used anymore, because it is not being maintained. It used to be the recommended way for lazy loading when rendering on the server side, while React.lazy only works on the client side. The React team now recommends another library for server side rendering.

Can I use React lazy and suspense in server side rendering?

React.lazy and Suspense are not yet available for server-side rendering. If you want to do code-splitting in a server rendered app, we recommend Loadable Components. It has a nice guide for bundle splitting with server-side rendering. The React.lazy function lets you render a dynamic import as a regular component.

How do I import a react-loadable component?

The component is imported using the dynamic import() syntax and assigned to the loader property in the options object. react-loadable also uses a loading property to specify a fallback component that is rendered while waiting for the actual component to load.