React Apps Development Using ReExt with Ext JS Components

The world is moving fast towards online businesses. Businesses are established online via social media, mobile apps, and websites. In other words, an online presence has become a necessity for businesses to stay competitive. You will find many tools in the market to develop business apps.

One of the most popular tools is Ext JS. People prefer React JS for the development process of their apps. Therefore, Ext JS Components by Sencha introduced ReExt into the market for creating React apps.

These days, React is the top pick for building mobile apps. Developers love it for creating fast, responsive apps that can grow with their user base. Whether you’re planning custom mobile app development for your startup or need cross-platform app development for your enterprise solution, using tools like ReExt with Ext JS components can make the journey significantly smoother.

In this blog, we will introduce you to ReExt, explain how to get started with ReExt to build an enterprise application and demonstrate advanced ReExt techniques. Finally, we will discuss the benefits of choosing Ext JS components for your React components apps.

Let’s begin our journey!

What Is ReExt?

ReExt gives the developers a platform to use the best combination of React flexibility with powerful UI Ext JS components. It lets you easily integrate Ext JS components into your React projects, so building modern, data-heavy applications becomes way easier. You get all the speed and flexibility of React, plus the solid, enterprise-level components that Ext JS is known for.

The best part? ReExt packs 140+ ready-to-use components – grids, charts, forms, toolbars – everything you need. Skip the grunt work and jump straight to building pro apps. These aren’t just pretty widgets either; they’re built tough for real business needs, with accessibility and mobile-readiness baked right in. No extra work needed.

What makes ReExt really stand out is how it speeds up your development process. Skip the boring setup work. With ready-made solutions, you can jump straight to building what makes your app special, saving tons of time. Need a React UI framework that’s both powerful and fast? Check out ReExt. It gives you great performance without the headache of building everything from scratch.

ReExt is especially beneficial for teams and businesses in need of robust React app development services. It enables developers to deliver powerful solutions quickly, with confidence in stability, performance, and design consistency.

Here is why choosing ReExt can be your best decision:

• Continuous updates and dedicated support from Sencha
• High performance even with large-scale datasets
• Cross-platform and cross-browser compatibility ensures broad reach
• Fully customisable components to match your project’s branding
• Reusable logic that promotes clean architecture and scalable development

Not only does it function as a reliable app development software, but it also fits effortlessly into modern workflows that include an application builder, no coding platforms, giving both developers and teams the speed and modularity they need.

Also Read: 10 Best React UI Component Libraries in 2025

Quick Start – Without Using VS Code Extension

This setup takes less than one minute to run. In this section, we assume that NPM is already installed on your system. The best part? You can run all the commands at once. So if you’re someone who prefers jumping straight into action without fiddling with configurations, this is a perfect starting point.

Perfect for whipping up quick prototypes or testing new features on the fly. Whether you’re a React pro or just starting out, this saves you tons of setup time. It’s also a lifesaver when you can’t install VS Code extensions, like when coding on remote servers or shared team environments. No fuss, no complicated setup, just get coding faster.

Contact Sencha support today to have more guidance on using the ReExt.

Set up on MacOS

Use the commands below in a macOS terminal window.

Vite

npm create vite@latest reextvite -- --template react-swc  
cd reextvite  
npm install @gusmano/reext@latest  
cp node_modules/@gusmano/reext/dist/example/ReExtData.json src/ReExtData.json  
cp node_modules/@gusmano/reext/dist/example/App.jsx src/App.jsx  
cp node_modules/@gusmano/reext/dist/example/main.jsx src/main.jsx  
npx vite --open

If you’re already familiar with creating an app using Vite, this will feel intuitive. Vite’s blazing-fast build tools make it a great match with ReExt, especially when aiming for smooth development flows.

Create Your React App

npx create-react-app reextcra
cd reextcra  
npm install @gusmano/reext@latest  
cp node_modules/@gusmano/reext/dist/example/ReExtData.json src/ReExtData.json  
cp node_modules/@gusmano/reext/dist/example/App.jsx src/App.js  
cp node_modules/@gusmano/reext/dist/example/main.jsx src/index.js  
npm start

React’s CLI tool makes scaffolding your project a breeze. By integrating ReExt right into your React app, you’ll be setting up your UI foundation within minutes.

Set up on Windows

Use the commands below in Windows Command Prompt.

Vite

npm create vite@latest reextvite -- --template react-swc  
cd reextvite  
npm install @gusmano/reext@latest  
xcopy node_modules\@gusmano\reext\dist\example\ReExtData.json src\ReExtData.json /Y    
xcopy node_modules\@gusmano\reext\dist\example\App.jsx src\App.jsx /Y    
xcopy node_modules\@gusmano\reext\dist\example\main.jsx src\index.js /Y    
npx vite --open

For Windows users, this method is just as straightforward. These commands are native to the platform, making integration hassle-free. No extra configurations needed—just run, and you’re set.

Create React App

npx create-react-app reextcra      
cd reextcra         
npm install @gusmano/reext@latest  
xcopy node_modules\@gusmano\reext\dist\example\ReExtData.json src\ReExtData.json /Y  
xcopy node_modules\@gusmano\reext\dist\example\App.jsx src\App.js /Y  
xcopy node_modules\@gusmano\reext\dist\example\main.jsx src\index.js /Y  
npm start

And just like that, your React app is up and running with ReExt components baked in. Whether you’re aiming for mobile app development with React or simply exploring cross platform app development setups, this quick start method gets you moving in the right direction with zero friction.

How Do You Build a Simple Application with ReExt?

Here is the step-by-step guide on creating a React component web app:

Create a React Application

Use the below command to create a new React application:

 npx create-react-app reextcra

Install Vite

Alternatively, you can use Vite to create a React application:

npm create vite@latest reextvite -- --template react-swc

Vite is super lightweight and known for its speed, so if you’re someone who prefers a snappier setup and hot module replacement, this might be your go-to option.

Installation

Use npm to install React ReExt:

 npm install @gusmano/reext

This installs the ReExt library into your project so you can start using pre-built Ext JS components inside your React codebase right away.

Installing the Sencha ExtJS SDK

React ReExt depends on Sencha ExtJS. You need to have the ExtJS framework installed in the public folder of your React project. If you’re just exploring or testing things out, you can also link to the SDK from a remote server.

Configuring React ReExt

React ReExt can be configured to use any commercially available version of the Sencha Ext JS framework (7x and above). Just be sure the version you select is compatible with your project setup.

Usage – ReExtProvider

In your main.jsx or index.js, use the ReExtProvider component to wrap your application. This step is essential for initialising ReExt correctly and passing in its configuration data.

Usage – Example Code

 import React, { useState, useRef } from 'react';
   import ReExt from '@gusmano/reext';
   const App = () => {
       const [labelcmp, setLabelCmp] = useState(null);
       const labelcmpRef = useRef();
       labelcmpRef.current = labelcmp;
       const [labeltext, setLabelText] = useState('initial text');
       const [row, setRow] = useState(null);
       return (
           <div style={{ boxSizing: 'border-box', height: '100%', display: 'flex', flexDirection: 'column' }}>
               <ReExt xtype='logo' />
               <div style={{ display: 'flex' }}>
                   <ReExt xtype='button'
                       config={{ text: 'click me', width: 100, ariaLabel: 'demobutton' }}
                       onTap={() => {
                           labelcmpRef.current.setHtml('set using method call');
                           setLabelText('set using state');
                       }}
                   />       
               </div>
               <ReExt xtype='grid'
                   style={{ height: 300 }}
                   config={{             
                       title: 'grid',
                       columns: [
                           { text: 'Name', dataIndex: 'name', width: 200 },
                           { text: 'Email', dataIndex: 'email', flex: 1 },
                           { text: 'Phone', dataIndex: 'phone', width: 200 }
                       ],
                       data: [
                           { name: 'Lisa', email: '[email protected]', phone: '555-111-1224' },
                           { name: 'Bart', email: '[email protected]', phone: '555-222-1234' },
{name: 'Homer', email: '[email protected]', phone: '555-333-1244' },
{name: 'Marge', email: '[email protected]', phone: '555-444-1254'}
                       ]
                   }}
                   onSelect={(grid, selected) => {
                       var row = selected[0].data
                       setRow(row)
                       var rowString = JSON.stringify(row)
                       labelcmpRef.current.setHtml(rowString)
                       setLabelText(rowString)
                   }} />
<div style={{ flex: 1, padding: 20, border: '1px solid gray' }}>
                   {row !== null &&
                       <>
 <ReExt xtype='label' config={{ html: `name: ${row.name}` }} />
 <ReExt xtype='label' config={{ html: `email: ${row.email}` }} />
 <ReExt xtype='label' config={{ html: `phone: ${row.phone}` }} />
                       </> }
               </div>
  <div style={{ flex: 1, padding: 20, border: '1px solid gray' }}>
  <ReExt xtype='label' config={{ html: 'initial text' }}
                       ready={(cmp) => {
                           setLabelCmp(cmp) }}/>
                   <ReExt xtype='label'
                       config={{ html: labeltext }}
                   />
               </div>
           </div>
       )
   }                          
export default App;

Run the React Application

Use npm start for Create React App or npx vite –open for Vite.

This process is great for developers who want to learn how to debug a React app in VS Code, as using ReExt in VS Code allows quick identification of issues and visual feedback while developing enterprise-grade apps. It’s a hands-on way to not only explore component-driven development but also understand how React and Ext JS can work together in real-world projects.

What Are the Advanced ReExt Techniques for React Apps?

Advanced ReExt Techniques come with more complex use cases. In other words, it offers powerful solutions for:

State management

State management can be achieved through React’s Context API or Redux. Furthermore, it provides a centralised store for shared data. This helps to keep away from Nested data propagation. Eventually, maintaining the complex state transition of large applications becomes easier.

Data binding

Data binding enables dynamic updates between the UI and the data model. In other words, it helps in ensuring consistency. Whenever the data changes, the UI reflects those changes automatically, with no need to manually refresh anything. This real-time reactivity boosts the overall user experience.

Theming

Theming allows customisation of the application’s look and feel. As a result, it can give us an excellent user experience. It provides many options, from using light and dark modes to a specific colour scheme of your brand and typography. Theming with ReExt makes styling clean, scalable, and reusable.

These techniques are vital in modern custom mobile app development, where responsiveness and performance across platforms are essential. When they are combined with different strategies related to cross platform app development, they result in smooth, flexible and consistent experiences for users.

Additionally, these advanced features simplify long-term maintenance. As your app grows, having a centralised state, consistent themes, and reactive data bindings means fewer bugs and easier updates. That’s why ReExt is a great fit for teams building enterprise-grade solutions or scaling applications for wider audiences.

What Are the Benefits of Using ReExt in Your React App Projects?

ReExt brings several advantages to the development of React applications. Let’s scan through why it’s important and suitable for your new project development. It’s mainly about saving time and making the development process flexible and smoother.

Boosted Developer Productivity

ReExt provides you the opportunity to use built-in components by combining the strengths of React with Ext JS. By using this, you don’t really need to build everything from scratch, which eventually saves your time and speeds up the process.

Faster Prototyping and Development

One of the biggest perks is how much quicker you can develop apps. ReExt speeds up the entire process, so your team can focus on what really matters—delivering great features, not just building the UI.

Consistent User Interfaces

ReExt provides well-styled and structured UI components right out of the box. This really helps to maintain the consistent branding. It also makes a smooth and flexible user experience while using the apps.

Ideal for Enterprise Apps

If you’re working on business tools that deal with large datasets, grids, or charts, ReExt is a solid choice. It’s helpful in managing the complicated tasks without putting too much effort. This makes it perfect for enterprise-level applications that need to handle a lot of data at once.

Perfect for Cross-Platform Solutions

Whether you’re targeting desktop or mobile, ReExt has you covered. It really helps in a smooth development process for mobile applications. It also integrates with other React frameworks very nicely.

In short, ReExt is one of the best UI frameworks and the most widely used choice for React. It is used especially in scenarios where you want a robust, scalable solution for both desktop and mobile applications.

Conclusion

In this blog, we showed how to use Ext JS with React for building web apps. We covered how ReExt lets you add interactive components to your React apps. Plus, we walked through creating a simple data-fetching app using ReExt—it’s that easy!

By the end, we showed some ReExt techniques and the benefits of using ReExt for a React team. Create your web app today by integrating React with Ext JS. Whether you’re building from scratch or modernising an existing project, this approach can save hours of coding and offer long-term flexibility.

Whether you’re using development software, trying out application builder no coding tools, or exploring web development services to support your business, ReExt makes React JS app development faster and more efficient. It’s especially useful for teams that need reliable components, smooth performance, and scalable architecture right out of the box.

Also Read: A Step-by-Step Guide To An Ext JS Tutorial For Beginners

FAQs

What is React in programming?

React is basically a JavaScript library that is used for building user interfaces efficiently. It lets developers create enterprise-level web applications that can load data in real time without reloading the whole page. This can help in a smooth user experience.

How to create a React app in VS Code?

First, you need to install Node.js, then open the VS Code terminal and run

npx create-react-app my-app

Move through the directories and run

npm start

This will launch your app.

How to debug a React app in VSCode?

Here’s what you need to do:

Install the Debugger for Chrome extension. Once that’s done, set your breakpoints in the code where you want things to pause. Then, open your app in Chrome. Finally, go to the Debug tab in VS Code and hit start to begin debugging.

How to create a front-end using React?

React allows you to build the front end using components. Use JSX to write HTML-like syntax and manage application logic with JavaScript.

What are web development services?

Web development services handle it all in building websites. It includes designing, building, and keeping sites running smoothly. Whether you need just the user interface (front-end), server work (back-end), or the whole package (full-stack), they’ve got you covered.

What are the most popular front end web development frameworks?

Front-end developers love React, Angular, and Vue.js. React takes the crown, though – its flexibility and massive ecosystem make it the go-to choice for most projects.

Which framework is best for web development?

React is often considered the best for dynamic single-page applications. For full-stack solutions, frameworks like Next.js or Angular are also excellent choices.