Web Development

React Concurrent Mode: What It Is and How to Use It?

React Concurrent Mode boosts app speed by managing multiple tasks efficiently, reducing lag, and enhancing user interactions, making it essential for modern web applications.

React has revolutionized how many web apps are created. It enables the developers to establish high response and fast loading UI’s. One of its newest releases is called React Concurrent Mode, and its primary concern is app performance. Thus, it lets multiple tasks be handled by React simultaneously so that the applications function better.

If you select tools for your business app, the features of React Concurrent Mode can be implemented to add on to your app. This brings one important feature of ensuring the efficiency of the website’s operations in terms of functionality and user experience as well as during proxies or during heavy operations such as data fetching or a new set of components loading.

In this article, we will start by defining React Concurrent Mode, explaining its importance, and discussing how to use it. React.js, a popular JavaScript library for front-end development, introduces Concurrent Mode to enhance application performance and responsiveness. Keep reading to take a closer look at how this feature can improve your applications.

What Is React Concurrent Mode?


What Is React Concurrent Mode

Concurrent Mode is a feature available in React that helps apps to enable working on multiple tasks simultaneously. Usually, React sequentially handles tasks, so if there are many tasks, the app will be slow at handling them. In Concurrent Mode, React must be able to put a hold on and switch between tasks to maintain the App’s performance.

It enhances user experience since React can rapidly update a specific part of the UI, render something like a loading spinner, or change the screen. This makes it especially useful for heavy workloads like data fetching or serious UI updates.

Since tools help businesses use their functionality, React Concurrent Mode can enhance the speed and stability of apps. For an application developer, it is beneficial to produce applications that are not likely to frustrate users with lag during operations such as loading, transferring data, and others.

Must-Know React Concurrent Functionality


Must-Know React Concurrent Functionality

Here are some of the leading React concurrent functionalities that shape your operations:

  • Roots: Ability to control the initial rendering
  • Time slicing: Setting priorities for upcoming events
  • React Suspense: Suspends/resumes component rendering
  • React Cache: Precache and warm data prior to use
  • Hidden (Prop): Allows hiding HTML components during initial rendering
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# Why Concurrent Mode in React Is a Game-Changer?

What makes Concurrent Mode in React special is that it makes applications more performant and easier to use.

In traditional React, a task is achieved individually; one task is worked on at a time. What this does is that the app slows down and becomes unresponsive when there are a lot of activities taking place, such as getting data or drawing out a complex component.

Concurrent Mode alters this by enabling React to operate on multiple tasks simultaneously. Here are the top reasons that make Concurrent Mode in React a top choice for businesses:

  • With Concurrent Mode, React can interrupt some less important operations and refresh more important content. For example, if a user interacts and clicks a button when the app is loading data, React can focus on the button click and process the rest of the interactions later. This makes the app feel as if it is performing faster and is way more responsive.
  • This is useful for businesses, especially those that use online tools for productivity. Some applications that benefit from real-time data work with big tables or have dynamic UI can benefit from Concurrent Mode. It ensures users have a great user experience regardless of the number of tasks the app takes.
  • Suspend and Transitions are two new elements that can handle load states and animations in React Concurrent Mode. These tools enhance the app’s appearance and functionality, and their availability enhances its interactivity.
  • Hence, using Concurrent Mode, app developers can develop applications that give quick feedback to user actions without lag.

# How To Use React Concurrent Mode?

To enable Concurrent Mode, you first need to add the concurrent flag to your React app. This is done by setting the `concurrent` property to `true` in your `package.json` file:

{
"dependencies": {
"react": "^17.0.2",
"react-dom": "^17.0.2"
},
"concurrent": true
}

After that, one is free to start using Suspense. In concurrent Mode, suspense allows you to define what parts of the UI should be rendered and when React should simply wait for some data to be ready.
Here is an example of how to use Suspense in your app:

function MyComponent() {
const data = useAsyncData();
 
return (
<Suspense fallback={<Loading />}>
<div>
{data.map((item) => <Item key={item.id} />)}
</div>
</Suspense>
);
}

By following these steps, you will be able to enable Concurrent Mode in your app, resulting in a more capable and friendly user interface. If these features are implemented for business entities that practice tools that significantly enhance the application’s performance, benefiting the end-users.

# Best Practices For Using Concurrent Mode

To get the best results from React Concurrent Mode, follow these practices:

Use Transitions for Smooth Updates

The `startTransition` API helps React prioritize important updates. Use it for animations or background tasks to keep the app responsive during user interactions.

Split Large Components

Break big components into smaller ones to speed up rendering. Smaller components are easier to manage and allow React to update the app more efficiently.

Optimize with Memoization

Use memoization and pure components to avoid unnecessary re-renders. This improves performance by caching heavy computations and only re-rendering when needed.

These practices ensure your app runs smoothly and stays user-friendly.

# Why Do Businesses Need React JS Development Services?

ReactJS development services offer many benefits that make them essential for businesses. Here’s why:

Performance and Speed

React uses a virtual DOM, ensuring faster rendering and better performance. This helps businesses deliver quick and efficient applications.

Scalability

React’s component-based structure simplifies maintenance and scaling. Developers can update parts of an app without affecting the whole system.

User Experience

With React, businesses can create dynamic and interactive user interfaces. This improves customer satisfaction and loyalty.

SEO-Friendly

React’s server-side rendering improves SEO, helping businesses attract more traffic.

Cross-Platform Compatibility

React works across web and mobile platforms, reducing development time and offering a consistent experience.

Strong Community Support

React has a vast developer community, providing resources and tools for smooth development.

By hiring a React JS development company, businesses can build high-performing applications that support growth and customer engagement.

Conclusion


With Concurrent Mode, there are now a lot of exciting possibilities. Increasing the speed, efficiency, and user interface of the website has always been the mission.

Count on Shiv Technolabs for your React JS development services and be on the right path to creating your next high-performing yet successful app that lets your business take flight in the digital world.

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Written by

Dipen Majithiya

I am a proactive chief technology officer (CTO) of Shiv Technolabs. I have 10+ years of experience in eCommerce, mobile apps, and web development in the tech industry. I am Known for my strategic insight and have mastered core technical domains. I have empowered numerous business owners with bespoke solutions, fearlessly taking calculated risks and harnessing the latest technological advancements.