How to Optimize Your ReactJs App PerformanceHow to Optimize Your ReactJs App Performance? Top Tools to Consider in 2022

2022 is going to be more competitive for online businesses. The year started with a significant rise in COVID-19 cases in many parts of the world. With ongoing restrictions on mass gathering, lockdown, and social distancing, more retailers may switch to digital solutions.

But what will happen once the pandemic is over? Will people return to brick-and-mortar stores? Will my online business fail?

These are some questions people have before developing a web application. If such questions have also crossed your mind, we can help you.

Firstly, you should know that the dependency on online solutions started as a need. But it will become a preference for various reasons. It is convenient. And thanks to technologies like Virtual Reality and Artificial Intelligence, online solutions are easy to access. Besides this, customers can avail themselves of numerous offers and discounts, which are not available off-line.

Survey studies and surveys suggest that the demand for online solutions is likely to remain dominant even after the pandemic. Therefore, your web application must stand out from the rest. As a result, you can gain more traffic and sales. Are you wondering how to do so? If ReactJs is your first choice for your upcoming project, you are just at the right place. Before you hire a ReactJS developer, you need to get familiar with the tools for optimizing app performance.

• ReactJs app performance optimization: Top tools and best practices

ReactJS comes with excellent features and capabilities to develop dynamic and high-performing apps. So, why does it need performance optimization? While ReactJs can render components efficiently, your app may face performance issues because of several factors. Moreover, if your ReactJs app is medium-to-large sized, the chances are higher.

Whether you hire an on-site or freelance React developer, make sure they have experience working with these tools. Let us learn more about them.

React.PureComponents

Do you know JavaScript can alter the state of variables? The programming functions depend on these variables. When it comes to ReactJs, it has two types of components, such as function components and purecomponents. Of course, each comes with a different way of optimizing the React app. But we will talk about React.PureComponents.

You can use ShouldComponentUpdate that offers you control of the function. If the last rendering results in the same states and props, they are referred to as pure components. These components allow a shallow comparison of state modification. It means they will compare and determine if the states and props are similar. If they are, no re-rendering will take place for updates.

React.Fragments

Another way to optimize the performance of your ReactJs app is using React.Fragments. It allows you to avoid adding extra HTML element wrappers. If you do not want an additional node to group a list of children, use React.Fragments.

class Comments extends React.PureComponent{
render() {
return (
<React.Fragment>
<h1>Comment Title</h1>
<p>comments</p>
<p>comment time</p>
</React.Fragment>
);
}
}

Besides this, you can use this modified syntax that is more concise.

class Comments extends React.PureComponent{
render() {
return (
<>
<h1>Comment Title</h1>
<p>comments</p>
<p>comment time</p>
</>
);
}
}

JSX elements

Your prospective ReactJs developer can also use JSX elements like values to optimize your app. Also, inline and constant elements are efficient in this regard. These elements can help you scale your values by minimizing the calls to React.createClass. In addition to this, the inline elements can be useful converting JSX components into object literals. Use this code in package.json:

“babel”: {
“env”: {
“production”: {
“plugins”: [
“transform-react-constant-elements”,
“transform-react-inline-elements”
]}
}
}

React.Lazy

Most ReactJs developers prefer lazy loading to optimize the performance of apps. After all, it allows them to load essential components requested by users. Let us take can an example of an e-commerce site.

For instance, your users request to see the payment option, React.Lazy can help you speed up the loading. Besides this, you can display images or videos only when your user requests. So far, it is one of the best ways to improve the performance of the ReactJS app. React.Lazy works on a callback function parameter and uses an import() syntax to load the component file. Follow this code for lazy loading:

// MyComponent.js
class MyComponent extends Component{
render() {
return (<div>MyComponent</div>)
}
}
const MyComponent = React.lazy(()=>import(‘./MyComponent.js’))
function App() {
return (<div><MyComponent/></div>)
}

1. React.Suspense

In some cases, medium or large-scale React applications may face a time lag. It is usual when a user requests components like an image or video. Thanks to React.Suspense, you can provide them with feedback about the time lag. Below is the code you can use for React.Suspense.

// MyComponent.js
const MyComponent = React.lazy(()=>import(‘./component.js’))
function App() {
return (
<div>
<Suspense fallback={<div>loading ..</div>}>
<MyComponent />
</Suspense>
</div>)
}

Wrap up

No doubt, ReactJs builds a robust, feature-rich, and highly-performant app. But some unwanted components, variables, codes, and updates can potentially affect its performance. So, it is crucial to choose the right tool to optimize your ReactJs app in 2022. We have mentioned a few in this post.

If you want to hire ReactJs developers in India with relevant experience and skill sets, get in touch with SoftProdigy. We have a team committed to delivering high-quality ReactJs development services.

FAQs

What makes the ReactJs app slow?

When it comes to app performance issues, they do not root from ReactJs. But several factors contribute to poor performance, such as non-optimized images, Analytic tracking libraries, iframes, excessive CSS animations, etc.

Which is faster ReactJs or JavaScript?

The loading speed of ReactJs and JavaScript is almost similar. Both are high-performing by default. But certain factors can lead to poor performance.

What are the benefits of ReactJs?

Thanks to its extremely intuitive nature, ReactJs creates highly interactive UI. Also, it builds faster and quality apps, which saves time for developers and enterprises.

What makes ReactJs efficient?

ReactJs runs on Virtual DOM that makes UI updates more efficient than ever.

Which hook do developers use to optimize app performance?

ReactJs developers use a useMemo() hook to optimize the performance React app.

Is React Virtual DOM faster?

React Virtual DOM is a JS object. It is because reading/writing on real DOM costs more money than reading/writing on an object.