Impulse Response Enterprises Ltd

How to Create a React Native Wrapper App for Your Website

Have you ever wanted to turn your website into a mobile app without rewriting your entire codebase? With React Native and Expo, you can wrap any website into a fully functional mobile application in just a few minutes. This guide will walk you through the entire process, from setting up your development environment to publishing your app.

Whether you're a developer looking to quickly launch a mobile presence or a business owner wanting to reach more customers, this approach is cost-effective, efficient, and surprisingly simple.

What You'll Need Before Starting

• VS Code (or any code editor)

• Node.js installed on your computer

• Android Studio (if you want to test on Android emulators)

• An Expo account (free to create at expo.dev)

• Your website URL (we'll use https://doncharles005.github.io/spacedefender/ as an example)

Step 1: Create Your Expo Account

1. Go to expo.dev and create a free account

2. Once logged in, click on "Create Project"

3. Give your project a name

4. After creation, you'll see a dashboard with commands to run – keep this open

Step 2: Set Up Your React Native Project

Open VS Code and follow these steps:

To open the terminal window in VS Code press Ctrl + `.  Or to the top menu bar, go to ‘Terminal’ and select “New Terminal”.

Then

Create a project with this command
  npx create-expo-app@latest ./ --template default@sdk-55

Key points

• ./ means “use the current directory.”

• --template default@sdk-55 pins the project to SDK 55.

• If you omit @sdk-55, it will use the latest SDK (currently SDK 57).

• If you provide a folder name instead of ./, it will create a new folder with that name.

Why SDK 55? SDK 55 is stable and well-tested. If you omit @sdk-55, Expo will use the latest SDK (currently 57), which might have compatibility issues.

Step 3. Initialize The EAS Project

The next command you should type if you created the project in Expo is

npm install --global eas-cli && eas init --id xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx 

The command npm install --global eas-cli will upgrade the eas-cli. The command 

eas init --id xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx will connect your project that you are working on in VS Code with the project you created in Expo. 

Pro Tip: Copy the project ID directly from your Expo dashboard to avoid typos.

Step 4. Running the App

Run the following command to start the Expo development server:

npm start (or `expo start`)

This will produce a QR code. You can scan the QR code if you are testing on your phone. Or you can use Android Studio.

Note, Android Studio must be installed to use Android Studio. I am using Android Studio with Pixel 6 emulator. Android Studio must be opened, or you will get an error.

Press ‘a’ in the terminal window to use Android Studio. In the terminal window, it will tell you that it will install the correct files to make the SDK version compatible with Android Studio. Type y in the terminal window for yes.

Note, if you want to display the app on the web, you can press w, and it will open in an internet browser.

Step 5: Install WebView Dependencies

To display your website, you need the WebView package. In the terminal window, type the following command.

npx expo install react-native-webview

Note: If you can unable to run the above code in the terminal window, it may be due to the server running. You can close the server by going to the terminal window, then pressing the keys Ctrl + C. Then you can run the above command to install the react-native-webview.

Step 6. Add the url of the website in the App

Go to the index.tsx file of your app, and replace the code with the following command to wrap your website in the app:

import { useEffect, useRef } from "react";

import { BackHandler, StyleSheet } from "react-native";

import { WebView } from "react-native-webview";

export default function HomeScreen() {

  const webViewRef = useRef<WebView>(null);

  // Handle Android back button

  useEffect(() => {

    const backHandler = BackHandler.addEventListener(

      "hardwareBackPress",

      () => {

        // If you want to exit the app directly

        return false; // Return false to let the system handle back press (exit app)

        // OR if you want to navigate back in webview first:

        // webViewRef.current?.goBack();

        // return true; // Return true to prevent default behavior

      },

    );

    return () => backHandler.remove();

  }, []);

  return (

    <WebView

      ref={webViewRef}

      source={{ uri: "https://doncharles005.github.io/spacedefender/" }}

      style={styles.webView}

      javaScriptEnabled={true}

      domStorageEnabled={true}

      startInLoadingState={true}

      // Make webview responsive

      scalesPageToFit={true}

      // For better mobile experience

      injectedJavaScript={`

        // Add viewport meta tag if not already in your HTML

        const meta = document.createElement('meta');

        meta.name = 'viewport';

        meta.content = 'width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no';

        document.head.appendChild(meta);

        // Optional: Add responsive styles if needed

        const style = document.createElement('style');

        style.textContent = \`

          body {

            margin: 0;

            padding: 0;

            overflow: hidden;

            width: 100vw;

            height: 100vh;

          }

          canvas, #game-container, .game-wrapper {

            width: 100% !important;

            height: 100% !important;

            max-width: 100vw !important;

            max-height: 100vh !important;

          }

        \`;

        document.head.appendChild(style);

      `}

      // Handle navigation state changes

      onNavigationStateChange={(navState) => {

        // Optional: Track navigation

        console.log("Navigation:", navState.url);

      }}

    />

  );

}

const styles = StyleSheet.create({

  webView: {

    flex: 1,

    backgroundColor: "#000", // Optional: background color while loading

  },

});

Note: the website that is wrapped in the app is https://doncharles005.github.io/spacedefender/. All you have to do is replace that website with your website to wrap the app.

📱 Let Impulse Response Enterprises Ltd. Build Your App

At Impulse Response Enterprises Ltd. , we transform your vision into reality. Under the leadership of Dr. Don Charles, we bring over two decades of expertise in economic research. We currently have expertise in:

📊 Data Science & Analytics

• Economic Research: In-depth analysis with EViews, Stata, and Python

• Econometric Modeling: Advanced statistical analysis and forecasting

• Machine Learning: Build and deploy ML models for economic applications

• SQL & PHP: Create data-driven platforms with robust backends

• Data Visualization: Interactive dashboards connecting to economic data

💻 Development Expertise

• React Native & Expo: Build cross-platform mobile apps

• Three.js: Create immersive 3D dashboards and visualizations

• WordPress: Develop powerful content management systems

• Unreal Engine 5.7 & Godot: Build gaming experiences

• MetaTrader 5: Create trading platforms and indicators

🎮 Game & Interactive Development

• Web-based Games: HTML, CSS, JavaScript, Three.js

• 3D Experiences: Unreal Engine and Godot expertise

• Interactive Learning: Gamified platforms for economic education

🚀 Ready to Launch Your App?

Whether you need:

• A mobile wrapper for your website

• A data dashboard for economic indicators

• A machine learning platform for predictive analytics

• An immersive 3D visualization for complex data

• A trading application with MetaTrader 5 integration

We've got you covered.

📞 Get in Touch Today

Impulse Response Enterprises Ltd.

• Lead Director: Dr. Don Charles

• Expertise: EViews, Stata, Python, MATLAB, VS Code, MetaTrader 5, Unreal Engine 5.7, Godot, WordPress

• Languages: HTML, CSS, JavaScript, React Native, Three.js, PHP, SQL

• Services: Economic Research, Data Science, Machine Learning, App Development

Contact us at impulseresponseenterprisesltd@gmail.com to discuss your project.

Visit us at www.impulseresponseenterprises.cc to explore how we can support your project.