A comprehensive guide to the new features in React V18

January 10, 2023

React is a front-end JavaScript library for creating unique user interfaces with several components. It constantly monitors your updates and makes the necessary modifications. React helps developers debug their code on a wide scale. Using React development services at the production level necessitates the installation of both npm and Nodejs on their system.

React Js is a popular language among coders, accounting for roughly 40% of web development technology today. Its use extends to large web applications that can update data without encountering the loading effect. In a nutshell, it is a simple yet scalable programming language.

What has changed in the new React?

React has released its latest version, React 18. In contrast to the features of React 17, the latest version contains distinct functionalities to overcome the shortcomings of the previous version.

React 18 contains some of the best functional dependencies created to improve performance and make it easier for React developers.

It is used to design creative APIs and render HTML files. 

This section will go through what’s new in React 18.

React 18 Features

Moving on to the changes that come with the react 18 concurrent modes, here’s a comprehensive list of React Js development in California, each feature with a complete description. The following is a complete list of the new react 18 features outlined by our experts at JS Panther.

  • The launch of a new Root API

The “root” variable is a pointer to the top-level data structure that React uses to track a tree render. The previous root API (ReactDOM.render) was inaccessible to users since we linked it to the DOM element and accessed it via the DOM node without exposing it to users. We do not, however, need to save the root to the DOM node.

The legacy Root API has numerous challenges with periodic updates, such as continuing to send the container into the render even though it always stays the same. Because of the advent of a new root API, we no longer need to pass the container into the render.

Furthermore, the changes in the root API allow us to eliminate the hydrate procedure, replace it with a root option, and change how the render callback works.


  • Automatic Batching Improvements 

Batching means grouping React’s multiple state updates into one render state to get evaluated performance. Batching was done for React event handlers in previous versions of React. Other events, such as asynchronous state updates, updates inside promises, set timeouts, and native event handlers, are not batched by default in React.

The concern has been rectified by incorporating automatic batching into React 18 via the Root API; now, all updates, regardless of origin, will be automatically batched. Furthermore, using ReactDOM, you can opt-out of batching. flushSync() is used when you need to read something from the DOM shortly after the state has changed.

  • Keep your app responsive with New Start Transition API

One of the most major React 18 updates is the addition of the startTransition API, which keeps your app responsive even during huge screen refreshes. If your mobile apps become unusable during heavy update activities, the startTransition API can be very beneficial in handling such circumstances.

The API allows users to modify the concurrency aspect to facilitate user interaction. Heavy updates are wrapped as “startTransition” and will only be stopped if more urgent updates are launched. As a result, it distinguishes between critical and slow updates. If the transition is interrupted by user activities, React will discard any unfinished rendering work and render only the most recent update.

  • New Suspense SSR and architectural enhancements

The react server-side rendering has been architecturally improved in React 18. Server-side rendering generates HTML on the server from the react components and delivers it back to the client, allowing the client to see the page content before the JavaScript bundle loads and runs.

SSR does have a disadvantage.

  1. It prohibits components from waiting for data. Before producing HTML for the client, you must have your data ready for server components.
  2. To make the components interactive, you must first load the JavaScript for all components on the client.
  3. You must also wait for the components to hydrate before interacting with them. The issue can be solved by utilizing two new suspense features: Streaming HTML and Selective hydration.

HTML streaming on the server

React will deliver the static elements of UI components using suspense, which will decide which part of the component will take longer to load and what may be directly rendered, so the user does not have to wait for the initial UI render.

Selective Hydration on the client

Components wrapped in suspense will not block hydration with selective hydration. Once the JS and content for each component have been loaded, it will start hydrating without disrupting other components.

Finishing Words

React V18 is the go-to choice for upgrading React applications, providing performance boosts and advanced libraries & frameworks. Through its simple implementation process, user experience can be improved with the help of a reliable react development agency in US. React Js development services are a clear choice for enhancing web and mobile app development; its simple implementation process makes it easy to implement, leaving no excuse not to upgrade.

If you are wondering how to make this upgrade or seeking answers to related questions, hire a ReactJs development company. Our dedicated ReactJs developers will ensure that you upgrade seamlessly with minimal hassle. Contact JS Panther’s experienced development team of Js developers, who will offer you end-to-end solutions and guide you through every step. Get in touch with our Panthers today.

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