Introduction to the Latest Version of React 18


    React is an open-source, Javascript front-end library for constructing consumer interfaces. React is straightforward to examine and works fast, and is efficient, particularly in making scalable and reusable UI additives. 

    An assertion of the discharge plan for the approaching strong model of React 18 has been accomplished with the aid of using React team. which is to be had in beta.

    We are going to speak about a number of the top-notch function updates for react model 18 with code examples in this article.

    Introducing the New Root API 

    A root in React refers back to the top-stage statistics shape that renders a tree. In React 18, we can have two root APIs: the legacy root API and the brand new root API. 

    Legacy Root API 

    The legacy root API is the present API known as the ReactDOM.render approach. Legacy root API is just like utilization in react model 17, it’ll create a root going for walks in legacy mode. Before diving into reacts 18 to the production, a caution can be introduced on the use of the legacy root API. it’ll slowly put into effect the use of the brand new root API. The legacy root API can be deprecated in upcoming versions.

    You can refer to the below-given code example:

    Legacy root api

    New Root API

    The new root API can be noted with the ReactDOM create a Root approach. We should create first the basis thru the createRoot approach with the basic detail as an issue to apply it. After then we’ve to name the root. render approach and skip the app thing because of the parameter. By the usage of the brand new root API, we will use all of the multiplied and concurrent capabilities to be had in React 18.

    You can take reference of the following code

    New Root API

    Changes in Hydrate Method

    The rendering approach and hydrate approach are similar. But it allows connecting occasion listeners to the HTML factors withinside the bins which are rendered with the aid of using the ReactDOM server approach at the server aspect. With the hydrate root approach React 18 replaces this hydrate approach.

    Changes in Hydrate Method

    Changes in Render Callback

    From the brand new root, API renders callback is removed. But we can pass it as a property to the root component.

    From the new root, API renders callback is removed.

    Changes in render callback

    Improvement in Automatic Batching

    In React 18 the batching function merges more than one nation update right into a single consolidated re-render for advanced overall performance. For example, in case you replace multiple nation fees in an easy feature handler. Then, react18 will batch those updates right into a single replace and rerender the app most effective as soon as in preference to calling the rendering approach more than one time. 

    The overall performance of the app will be substantially enhanced with the aid of using this. It additionally prevents additives from rendering with incomplete nation updates in which the most effective one nation variable is updated, which can also additionally cause inappropriate conduct withinside the app.

    Improvement in automatic batching

    React development company will routinely combine all of the nation updates, regardless of in which they originate. Therefore, if any replace is internal a timeout, promise, local occasion handler, or another occasion, the React 18 model will batch it withinside the identical manner as updates internal React events. This will in addition decorate the overall performance of the app and cause fewer re-renderings of the additives as compared to the preceding React versions.


    Disable Automatic Batching

    Sometimes, we need to immediately refurnish the component after each and every state change. In that scenario, to disable the automatic batching use the flushSync method.

    Disable Automatic Batching


    We can bring off server-side rendering in react native development services by rendering all the components on the server first. Then, we require to send the results as HTML elements to the browser. 

    React will load JavaScript as traditional withinside the browser. Then it will connect the HTML elements generated from the server with the javascript and hydration logic.

    The server-aspect rendering (SSR) lets us peer the web page content material earlier than the JavaScript package masses and runs.

    The feature of suspense will delay the rendering of components in react native development. It was first introduced in React version 16.6 with positive obstacles and a simple assist for suspense rendering.

    React 18’s stable version will support a full-fledges suspense feature based on the concurrent feature, along with the following:

    • Delayed Transition: It gives instructions to the components to wait for the data to be resolved before proceeding with a new state transition.
    • Placeholder Throttling: By throttling the appearance of nested place holder and successive placeholder components by reducing UI thrash.
    • SuspendList: arranging components in the order in which these components need to be revealed to the user is done by SuspendList.

    From the previous versions, React 18 handles suspense differently. This seems to be a breaking change. But with automatic batching, the impact of the change is minimal. The migration process of the app to React version 18 is not affected by this. 

    The suspense in React 16 and 17 was called legacy suspense earlier. The improved suspense in the React 18 is called concurrent suspense.

    In general, each legacy and concurrent suspense functions provide an identical fundamental consumer experience, other than resolving the Component that Suspends method, as withinside the following instance.

    Suspense code

    Here is an instance of an easy explanation  of ways a suspense factor will paintings withinside the older and new react 18 versions:

    • The legacy suspense will without delay mount the sibling factor to the DOM. its lifecycle hooks/results could be additionally fired. It won’t watch for the component that suspends to be resolved.
    • As compared to legacy suspense concurrent suspense won’t mount the sibling factor to the DOM and additionally now no longer hearthplace its lifecycle hooks/results till the component that suspends is resolved. All the present troubles withinside the legacy suspense could be resolved through those new enhancements.


    To execute multiple tasks at the same time concurrency helps you. If we take standard react native app development services, for example. Concurrency permits UI interaction with the react components at the same point of time when we execute an animation action in a component.

    Earlier, all the updates had the same priority, and an update of only one set state was possible. The start transition API helps the new concurrency feature mark all the updates as non-urgent. React will interrupt them or put them on hold, based on the given priority.


    We try to provide the best information and we hope that the above-given information is beneficial for you. For the developer community React 18 stable version will bring an exciting new set of features. The essential awareness is on concurrency and slow up-gradation to the more modern model. Since its miles are nevertheless in beta, The react native development company created an operating organization to put together the surroundings for the easy transition to the brand-new model.

    Bonus Material: Future Scope of React Native for Mobile App Development

    About author
    RanjitPal Singh
    Ranjitpal Singh is the CEO and founder of RichestSoft, an interactive mobile and web Development Company. He is a technology geek, constantly willing to learn about and convey his perspectives on cutting-edge technological solutions. He is here assisting entrepreneurs and existing businesses in optimizing their standard operating procedures through user-friendly and profitable mobile applications. He has excellent expertise in decision-making and problem-solving because of his professional experience of more than ten years in the IT industry.

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