Nettyfy Technology is always ready to work and deliver the latest technologies. As a top JavaScript Development Company , here in this article, we are discussing the new React v18.0. React v18.0 is an excellent and advanced version of React released on March 8, 2022. It has countless sudden and dramatic features and updates for the React.js development community. The good news is that it doesn’t break your existing code. So, what you learned still applies as well. You still write code the same way as before.

What is New in React 18?

React 18 new features and clarification are possible thanks to the latest opt-in “concurrent rendering” mechanism in React 18 that allows React to create multiple versions of the UI at the same time. Though this change is mostly behind the scenes, it will unlock new possibilities to improve the app performance. — React document.

So, let’s talk about React 18 latest features and updates.

1. Concurrency

The most crucial addition in React 18 is concurrency. I think this is basically right for developers, though the story may be a bit more complex for library maintainers. Concurrency is not a feature. It’s a new behind-the-scenes mechanism that enables React to prepare multiple versions of your UI at the same time. You can think of concurrency as an implementation detail — it’s valuable because of the features that it unlocks.

2. New APIs

Now, you can enumerate react state updates that have lesser priority by using one of the new APIs introduced with React 18.

3. useTransition() & StartTransition() Hook

By default, all updates in React are considered urgent. That could create a complication when prompt updates are slowed down by dense updates. However, starting React 18 and the new concurrency features, you can spot some updates as disreputable and non-urgent — so-called transitions. That’s useful with dense UI updates, like filtering bragging lists.

Wrap a state update with startTransition() to let React know that it is possibly managed with lower priority.

4. State Update Batching

Automatic Batching

React 18 also comes in support for batching the state updates. Batching is when React groups multiple state updates into a single re-render for better performance. Earlier react also used to batch state updates for example if set A(5) and set B(7) where set A and set B are two state variables and of course it will batch them together nut there were certain conditions where react would not batch them for example in setTimeout. So, that is now fixed in react 18.

Batching is when React groups multiple state updates into a single re-render for better performance. Without automatic batching, we only batched updates inside React event handlers. Updates inside of promises, setTimeout , native event handlers, or any other event were not batched in React by default. With automatic batching, these updates will be batched automatically.