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Learn Reactxp - 9 Code Examples & CST Typing Practice Test

ReactXP is a library developed by Microsoft for building cross-platform apps using a single React and React Native codebase. It enables developers to target iOS, Android, and web platforms simultaneously.

View all 9 Reactxp code examples →
ReactXP Simple Todo AppReactXP Counter AppReactXP Step CounterReactXP Dark Mode CounterReactXP Multi CounterReactXP Auto Increment CounterReactXP Todo With PriorityReactXP Countdown TimerReactXP Counter With Alert

Learn REACTXP with Real Code Examples

Updated Nov 23, 2025

Explain

ReactXP allows building cross-platform apps with consistent UI and behavior across iOS, Android, and web.

It leverages React and React Native components while providing abstractions for platform differences.

Ideal for teams who want a single codebase for multiple platforms using JavaScript/TypeScript.

Core Features

Core components for text, views, buttons, images

Platform-specific APIs abstracted through ReactXP

Unified animation and gesture handling

Navigation and layout components for mobile and web

Integration with React state management (Redux, MobX, Context)

Basic Concepts Overview

ReactXP components mirror React Native but are cross-platform

Use `RX.View`, `RX.Text`, `RX.Image` for consistent UI

Styles use JavaScript objects with common properties

State management via React state, Redux, or MobX

Platform-specific code can be handled with `Platform.select`

Project Structure

src/ - main source code including components and styles

index.web.tsx - web entry point

index.ios.tsx / index.android.tsx - mobile entry points

package.json - dependencies and scripts

node_modules/ - installed packages

Building Workflow

Initialize project using ReactXP CLI or custom setup

Create shared components for all platforms

Handle platform-specific differences via abstraction

Develop UI and logic using React patterns

Test on web, iOS, and Android frequently

Difficulty Use Cases

Beginner: simple shared UI components

Intermediate: handling navigation and gestures

Advanced: integrating platform-specific APIs

Expert: optimizing performance and animations across platforms

Community: creating custom cross-platform components or contributing to ReactXP

Comparisons

ReactXP vs React Native: ReactXP supports web natively, React Native is mobile only

ReactXP vs Flutter: ReactXP uses JS/React, Flutter uses Dart

ReactXP vs SwiftUI: ReactXP is cross-platform, SwiftUI is Apple-only

ReactXP emphasizes code sharing across platforms

Performance slightly lower than fully native solutions

Versioning Timeline

2016 - ReactXP initial release by Microsoft

2017-2018 - Adoption in Skype and other Microsoft apps

2019 - Updates for React Native 0.60+ compatibility

2020-2021 - Maintenance and minor improvements

2022-2025 - Community-driven fixes and documentation updates

Glossary

ReactXP: cross-platform React library

RX.View/Text/Button: core components

Platform.select: handles platform-specific code

State management: via React/Redux/MobX

Abstraction: hides differences between web and mobile

Installation Setup

Install Node.js and npm/yarn

Install ReactXP CLI or initialize with `npx create-reactxp-app`

Set up React Native for iOS/Android development

Add ReactXP to project dependencies

Run app on simulator, device, or web browser

Environment Setup

Install Node.js and npm/yarn

Install React Native CLI and Android Studio/Xcode

Initialize ReactXP project

Run on simulators and devices

Configure platform SDK paths

Config Files

package.json - dependencies and scripts

tsconfig.json - TypeScript configuration

index.web.tsx - web entry point

index.ios.tsx / index.android.tsx - mobile entry points

node_modules/ - installed packages

Cli Commands

npx create-reactxp-app MyApp

npm start - run on web or simulator

npm run ios - run on iOS simulator

npm run android - run on Android simulator

npm run build - production build for web

Internationalization

Use i18n libraries for localization

Text content centralized for translations

Support RTL and LTR layouts

Format numbers/dates with platform libraries

Localize images and assets when needed

Accessibility

Use accessible roles and properties on RX components

Support screen readers

Ensure keyboard navigation for web

Test across devices and platforms

Follow platform accessibility guidelines

Ui Styling

Use StyleSheet objects for consistent styling

Cross-platform flexbox layout

Conditional platform-specific styles via `Platform.select`

Responsive design for different screen sizes

Custom themes and reusable style modules

State Management

Local component state with React `useState`

Shared state with Redux or Context API

Reactive updates for cross-platform UI

Optional MobX integration

Maintain consistent state behavior across web and mobile

Data Management

Fetch data with Axios or Fetch API

Use local storage or SQLite for mobile

Cross-platform persistence abstraction via libraries

Handle JSON encoding/decoding

Synchronize state between web and mobile apps

Architecture

ReactXP wraps platform-specific components with unified API

Declarative, React-based architecture

Supports state-driven rendering with React state/Redux

Event-driven with cross-platform gesture handling

Modular design encourages reusable components

Rendering Model

ReactXP maps components to React Native and web targets

Declarative React architecture

State changes trigger re-renders

Cross-platform event handling for gestures

Platform-specific customizations via abstraction layer

Architectural Patterns

Declarative UI using React

State-driven component rendering

Platform abstraction via RX components

Composable and reusable component structure

Integration with Redux or Context for global state

Real World Architectures

Enterprise productivity apps

Cross-platform dashboards

Consumer apps with consistent UI on web and mobile

Internal tools for companies

Prototypes for startups with multi-platform targets

Design Principles

Cross-platform UI consistency

Reusable React components

Platform abstraction for gestures, layout, and styles

Minimal platform-specific branching

Maintainable and scalable architecture

Scalability Guide

Modular component structure

Lazy-load screens where possible

Optimize assets for web and mobile

Use global state management wisely

Test cross-platform performance frequently

Migration Guide

Update ReactXP and React Native versions

Refactor deprecated components

Adjust platform-specific code for new APIs

Test all platforms thoroughly

Check third-party library compatibility

Performance Notes

Reuse components to minimize re-renders

Use FlatList for large dynamic lists

Avoid heavy computations in render methods

Test animations on real devices for smoothness

Minimize platform-specific branching where possible

Security Notes

Sanitize user input

Follow web security best practices

Use HTTPS for network requests

Validate platform API usage

Keep dependencies updated

Monitoring Analytics

Integrate analytics for web and mobile

Track crashes using Sentry or Firebase

Monitor performance across platforms

Audit event handling and gestures

Ensure consistent behavior and responsiveness

Code Quality

Follow React/React Native best practices

Document shared components and styles

Use TypeScript for type safety

Write unit and integration tests

Profile performance and optimize renders

Practical Examples

Cross-platform chat or messaging apps

Internal enterprise dashboards

Consumer apps available on web and mobile

Prototypes for multi-platform startups

Apps using ReactXP for consistent styling and behavior

Troubleshooting

Check platform-specific dependencies

Ensure React Native and web environment correctly configured

Verify TypeScript types for ReactXP components

Debug layout issues with platform-specific styling

Resolve conflicts with third-party React Native libraries

Testing Guide

Unit tests with Jest

End-to-end tests with Detox or Cypress

Snapshot tests for React components

Test on iOS, Android, and web

Monitor performance on real devices

Deployment Options

Build web app for deployment with `npm run web`

Build mobile app via React Native CLI or Expo

Deploy iOS app via Xcode and App Store

Deploy Android app via Android Studio and Play Store

CI/CD pipelines can be set up using GitHub Actions or Azure DevOps

Tools Ecosystem

ReactXP library

React Native for mobile targets

React for web targets

TypeScript support for type safety

Redux, MobX, or React Context for state management

Integrations

React Router for web navigation

React Native Navigation for mobile

Axios or Fetch for network requests

Firebase or Azure services

Third-party React Native components where needed

Productivity Tips

Build reusable RX components

Test frequently on all platforms

Use TypeScript for predictable code

Leverage shared styling and layout modules

Document platform-specific differences carefully

Challenges

Build a cross-platform to-do list app

Implement gestures for web and mobile

Create responsive layout for multiple screen sizes

Integrate platform-specific APIs when needed

Deploy app to web and mobile stores

Learning Path

Learn React basics

Learn React Native basics

Understand ReactXP abstractions

Build simple cross-platform components

Deploy apps on web, iOS, and Android

Skill Improvement Plan

Week 1: React fundamentals and JSX

Week 2: React Native components and navigation

Week 3: Create cross-platform UI with ReactXP

Week 4: Integrate state management and network APIs

Week 5: Test and deploy cross-platform apps

Interview Questions

Explain ReactXP architecture and cross-platform approach

How does ReactXP differ from React Native?

How do you manage state in ReactXP apps?

Describe project structure for a ReactXP app

How to handle platform-specific differences in ReactXP?

Cheat Sheet

`RX.View` - cross-platform container

`RX.Text` - text element compatible with web and mobile

`RX.Button` - button with consistent behavior

`RX.Image` - image component

`Platform.select({ios: ..., android: ..., web: ...})` - platform-specific code

Books

Cross-Platform Apps with ReactXP

Mastering React Native & ReactXP

Building Enterprise Apps with ReactXP

ReactXP in TypeScript

Advanced ReactXP Techniques

Tutorials

Official ReactXP documentation and guides

YouTube tutorials on ReactXP apps

GitHub sample projects

Cross-platform React/React Native tutorials

Community blogs and code examples

Official Docs

https://microsoft.github.io/reactxp/

https://github.com/microsoft/reactxp

https://www.npmjs.com/package/reactxp

Community Links

ReactXP GitHub

StackOverflow ReactXP tag

Reddit discussions

Microsoft blogs

Twitter #ReactXP

Community Support

ReactXP GitHub repository

StackOverflow ReactXP tag

Reddit discussions

Microsoft blogs and documentation

Community samples and open-source components

Monetization

Consumer apps on web and app stores

Enterprise apps with subscription or licensing

In-app purchases via platform SDKs

Consulting for multi-platform app development

Rapid deployment solutions with shared codebase

Future Roadmap

Improved React Native compatibility

Community-driven enhancements

Better web integration and performance

Expanded cross-platform component library

Long-term support and maintenance

When Not To Use

Apps targeting a single platform where native UI is preferred

Projects requiring heavy platform-specific optimizations

Teams unfamiliar with React and JavaScript/TypeScript

Apps needing latest React Native libraries incompatible with ReactXP

High-performance graphics-heavy apps like games

Final Summary

ReactXP allows building cross-platform apps for iOS, Android, and web.

It unifies React and React Native into a single codebase.

Supports JavaScript and TypeScript development.

Ideal for enterprise projects requiring consistent UI across platforms.

Provides core components, gestures, and navigation abstractions for fast development.

Faq

Is ReactXP maintained?

Yes, primarily by Microsoft with community contributions.

Does it support web?

Yes, one of ReactXP’s main advantages over React Native.

Can I use TypeScript?

Yes, full TypeScript support is recommended.

Is it suitable for production?

Yes, particularly for enterprise apps needing cross-platform consistency.

Can I integrate third-party React Native components?

Yes, but some may require platform-specific adjustments.

Code Sample Descriptions

1

ReactXP Simple Todo App

import RX from 'reactxp';

class TodoApp extends RX.Component {
    constructor(props) {
        super(props);
        this.state = { todos: [], newTodo: '' };
    }

    addTodo = () => {
        if (this.state.newTodo.trim()) {
        this.setState({ todos: [...this.state.todos, this.state.newTodo], newTodo: '' });
        }
    };

    render() {
        return (
        <RX.View style={{ padding: 20 }}>
        <RX.TextInput
        value={this.state.newTodo}
        onChangeText={newTodo => this.setState({ newTodo })}
        placeholder='New Todo'
        style={{ height: 40, borderColor: 'gray', borderWidth: 1, marginBottom: 10 }}
        />
        <RX.Button onPress={this.addTodo} style={{ marginBottom: 10 }}>
        <RX.Text>Add</RX.Text>
        </RX.Button>
        {this.state.todos.map((todo, index) => (
        <RX.Text key={index}>{todo}</RX.Text>
        ))}
        </RX.View>
        );
    }
}

RX.App.register('TodoApp', () => TodoApp);

Demonstrates a simple ReactXP app with a Todo list, adding tasks, and displaying them using cross-platform components.

Let’s Try →
2

ReactXP Counter App

import RX from 'reactxp';

class CounterApp extends RX.Component {
    constructor(props) {
        super(props);
        this.state = { count: 0 };
    }

    increment = () => this.setState({ count: this.state.count + 1 });
    decrement = () => this.setState({ count: this.state.count - 1 });
    reset = () => this.setState({ count: 0 });

    render() {
        return (
        <RX.View style={{ padding: 20 }}>
        <RX.Text style={{ fontSize: 24, marginBottom: 10 }}>Counter: {this.state.count}</RX.Text>
        <RX.Button onPress={this.increment} style={{ marginRight: 10 }}><RX.Text>+</RX.Text></RX.Button>
        <RX.Button onPress={this.decrement} style={{ marginRight: 10 }}><RX.Text>-</RX.Text></RX.Button>
        <RX.Button onPress={this.reset}><RX.Text>Reset</RX.Text></RX.Button>
        </RX.View>
        );
    }
}

RX.App.register('CounterApp', () => CounterApp);

A simple counter app with increment, decrement, and reset buttons.

Let’s Try →
3

ReactXP Step Counter

import RX from 'reactxp';

class StepCounterApp extends RX.Component {
    constructor(props) {
        super(props);
        this.state = { count: 0, step: '1' };
    }

    increment = () => this.setState({ count: this.state.count + parseInt(this.state.step || '1') });
    decrement = () => this.setState({ count: this.state.count - parseInt(this.state.step || '1') });
    reset = () => this.setState({ count: 0 });

    render() {
        return (
        <RX.View style={{ padding: 20 }}>
        <RX.Text style={{ fontSize: 24, marginBottom: 10 }}>Counter: {this.state.count}</RX.Text>
        <RX.TextInput
        value={this.state.step}
        onChangeText={step => this.setState({ step })}
        style={{ height: 40, borderColor: 'gray', borderWidth: 1, marginBottom: 10 }}
        placeholder='Step'
        />
        <RX.Button onPress={this.increment} style={{ marginRight: 10 }}><RX.Text>+</RX.Text></RX.Button>
        <RX.Button onPress={this.decrement} style={{ marginRight: 10 }}><RX.Text>-</RX.Text></RX.Button>
        <RX.Button onPress={this.reset}><RX.Text>Reset</RX.Text></RX.Button>
        </RX.View>
        );
    }
}

RX.App.register('StepCounterApp', () => StepCounterApp);

Counter app with customizable step increment.

Let’s Try →
4

ReactXP Dark Mode Counter

import RX from 'reactxp';

class DarkModeCounterApp extends RX.Component {
    constructor(props) {
        super(props);
        this.state = { count: 0, isDark: false };
    }

    increment = () => this.setState({ count: this.state.count + 1 });
    decrement = () => this.setState({ count: this.state.count - 1 });
    reset = () => this.setState({ count: 0 });
    toggleTheme = () => this.setState({ isDark: !this.state.isDark });

    render() {
        return (
        <RX.View style={{ padding: 20, backgroundColor: this.state.isDark ? '#333' : '#fff', flex: 1 }}>
        <RX.Text style={{ fontSize: 24, marginBottom: 10, color: this.state.isDark ? '#fff' : '#000' }}>Counter: {this.state.count}</RX.Text>
        <RX.Button onPress={this.increment} style={{ marginRight: 10 }}><RX.Text>+</RX.Text></RX.Button>
        <RX.Button onPress={this.decrement} style={{ marginRight: 10 }}><RX.Text>-</RX.Text></RX.Button>
        <RX.Button onPress={this.reset} style={{ marginRight: 10 }}><RX.Text>Reset</RX.Text></RX.Button>
        <RX.Button onPress={this.toggleTheme}><RX.Text>Toggle Theme</RX.Text></RX.Button>
        </RX.View>
        );
    }
}

RX.App.register('DarkModeCounterApp', () => DarkModeCounterApp);

Counter app with light/dark theme toggle.

Let’s Try →
5

ReactXP Multi Counter

import RX from 'reactxp';

class MultiCounterApp extends RX.Component {
    constructor(props) {
        super(props);
        this.state = { counters: [0,0,0] };
    }

    increment = index => {
        const counters = [...this.state.counters]; counters[index]++; this.setState({ counters });
    };
    decrement = index => {
        const counters = [...this.state.counters]; counters[index]--; this.setState({ counters });
    };

    render() {
        return (
        <RX.View style={{ padding: 20 }}>
        {this.state.counters.map((count, i) => (
        <RX.View key={i} style={{ marginBottom: 10 }}>
        <RX.Text style={{ fontSize: 20 }}>Counter {i+1}: {count}</RX.Text>
        <RX.Button onPress={() => this.increment(i)} style={{ marginRight: 5 }}><RX.Text>+</RX.Text></RX.Button>
        <RX.Button onPress={() => this.decrement(i)}><RX.Text>-</RX.Text></RX.Button>
        </RX.View>
        ))}
        </RX.View>
        );
    }
}

RX.App.register('MultiCounterApp', () => MultiCounterApp);

Multiple independent counters in a single view.

Let’s Try →
6

ReactXP Auto Increment Counter

import RX from 'reactxp';

class AutoIncrementCounterApp extends RX.Component {
    constructor(props) {
        super(props);
        this.state = { count: 0, isRunning: true };
    }

    componentDidMount() {
        this.timer = setInterval(() => { if(this.state.isRunning) this.setState({ count: this.state.count + 1 }); }, 1000);
    }
    componentWillUnmount() { clearInterval(this.timer); }
    toggleRunning = () => this.setState({ isRunning: !this.state.isRunning });
    reset = () => this.setState({ count: 0 });

    render() {
        return (
        <RX.View style={{ padding: 20 }}>
        <RX.Text style={{ fontSize: 24, marginBottom: 10 }}>Counter: {this.state.count}</RX.Text>
        <RX.Button onPress={this.toggleRunning} style={{ marginRight: 10 }}><RX.Text>{this.state.isRunning ? 'Pause' : 'Resume'}</RX.Text></RX.Button>
        <RX.Button onPress={this.reset}><RX.Text>Reset</RX.Text></RX.Button>
        </RX.View>
        );
    }
}

RX.App.register('AutoIncrementCounterApp', () => AutoIncrementCounterApp);

Counter that automatically increments every second.

Let’s Try →
7

ReactXP Todo With Priority

import RX from 'reactxp';

class PriorityTodoApp extends RX.Component {
    constructor(props) {
        super(props);
        this.state = { todos: [], task: '', priority: '' };
    }

    addTodo = () => {
        if(this.state.task.trim()) {
        this.setState({ todos: [...this.state.todos, {task: this.state.task, priority: this.state.priority}], task:'', priority:'' });
        }
    };

    render() {
        return (
        <RX.View style={{ padding: 20 }}>
        <RX.TextInput placeholder='Task' value={this.state.task} onChangeText={task => this.setState({ task })} style={{ height:40,borderWidth:1,borderColor:'gray',marginBottom:5 }}/>
        <RX.TextInput placeholder='Priority' value={this.state.priority} onChangeText={priority => this.setState({ priority })} style={{ height:40,borderWidth:1,borderColor:'gray',marginBottom:5 }}/>
        <RX.Button onPress={this.addTodo}><RX.Text>Add</RX.Text></RX.Button>
        {this.state.todos.map((todo,i) => <RX.Text key={i}>{todo.task} (Priority: {todo.priority})</RX.Text>)}
        </RX.View>
        );
    }
}

RX.App.register('PriorityTodoApp', () => PriorityTodoApp);

Todo app where each task has a priority and displays it.

Let’s Try →
8

ReactXP Countdown Timer

import RX from 'reactxp';

class CountdownApp extends RX.Component {
    constructor(props) {
        super(props);
        this.state = { count: 10 };
    }

    componentDidMount() {
        this.timer = setInterval(() => { if(this.state.count > 0) this.setState({ count: this.state.count - 1 }); }, 1000);
    }
    componentWillUnmount() { clearInterval(this.timer); }
    render() {
        return (
        <RX.View style={{ padding:20 }}>
        <RX.Text style={{ fontSize:24, marginBottom:10 }}>Time: {this.state.count}</RX.Text>
        <RX.Button onPress={() => this.setState({ count: 10 })}><RX.Text>Reset</RX.Text></RX.Button>
        </RX.View>
        );
    }
}

RX.App.register('CountdownApp', () => CountdownApp);

Countdown timer starting from 10 seconds.

Let’s Try →
9

ReactXP Counter With Alert

import RX from 'reactxp';

class AlertCounterApp extends RX.Component {
    constructor(props) {
        super(props);
        this.state = { count: 0 };
    }

    increment = () => {
        const newCount = this.state.count + 1;
        if(newCount === 10) RX.Alert.show('Count reached 10!');
        this.setState({ count: newCount });
    };
    reset = () => this.setState({ count: 0 });

    render() {
        return (
        <RX.View style={{ padding: 20 }}>
        <RX.Text style={{ fontSize: 24, marginBottom: 10 }}>Counter: {this.state.count}</RX.Text>
        <RX.Button onPress={this.increment} style={{ marginRight: 10 }}><RX.Text>+</RX.Text></RX.Button>
        <RX.Button onPress={this.reset}><RX.Text>Reset</RX.Text></RX.Button>
        </RX.View>
        );
    }
}

RX.App.register('AlertCounterApp', () => AlertCounterApp);

Counter shows an alert when it reaches 10.

Let’s Try →

Frequently Asked Questions about Reactxp

What is Reactxp?

ReactXP is a library developed by Microsoft for building cross-platform apps using a single React and React Native codebase. It enables developers to target iOS, Android, and web platforms simultaneously.

What are the primary use cases for Reactxp?

Cross-platform mobile apps for iOS and Android. Web apps sharing the same codebase. Rapid prototyping of multi-platform applications. Enterprise apps requiring uniform UI across devices. Integration with React ecosystem libraries and tooling

What are the strengths of Reactxp?

Single codebase for web and mobile. Consistency in UI/UX across platforms. Leverages React and React Native knowledge. Supports TypeScript for type safety. Strong Microsoft backing and use in enterprise apps

What are the limitations of Reactxp?

Smaller community than React Native. Less frequent updates and ecosystem growth. Some platform-specific features still require custom code. Not as performant as fully native apps in extreme cases. Limited third-party library compatibility in some scenarios

How can I practice Reactxp typing speed?

CodeSpeedTest offers 9+ real Reactxp code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

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