Create Your Own React Native App With TypeScript Tutorial

React Native App with TypeScript Tutorial

TypeScript is an open-source programming language created and maintained by Microsoft. It is a superset of JavaScript that provides static typing, classes, and interfaces. TypeScript is increasingly becoming popular among developers and is now regarded as a reliable way to write maintainable, scalable, and secure applications.

React Native is also becoming increasingly popular, as it is a cross-platform mobile development framework used to build apps for iOS, Android, Web, and Windows. React Native apps are written in JavaScript with the help of React, a library for building user interfaces.

In this tutorial, we will be covering how to use TypeScript with React Native for creating a cross-platform mobile application. We will go through setting up the project, writing the code and other steps required to build a simple app.

Step 1: Setting up the React Native Project

To get started, we will need to install the TypeScript package in our React Native project. Install the package using npm or yarn as follows:

• npm: npm install --save-dev typescript
• yarn: yarn add --dev typescript

Next, we will create the project using the following command:

• npx: npx react-native init MyProject --template typescript
• expo: expo init MyProject --template typescript

This will create a new React Native project with TypeScript as the default language. It will also install the necessary packages that are required for running the project.

Step 2: Writing the Code

Now, we can start writing the code for our React Native app. To do this, open the project folder in your favorite IDE and edit the App.tsx file. This file contains the main component for our app and will contain all the other components that make up the app.

We will start by importing the necessary packages for our project. This will include the React and React native packages, as well as the TypeScript type definition files.

import * as React from 'react';
import { View, Text } from 'react-native';
import * as T from 'typescript';

// Add other imports here 

Next, we will create a basic React component that will display some text. This component will take in a string as a prop, which will be displayed on the screen.

function Hello({ text }: { text: string }) {
  return (
    <View>
      <Text>{text}</Text>
    </View>
  );
}

Finally, we can export the component so it can be used in our app.

export default Hello;

Step 3: Testing the App

Now, we can test our app. To do this, run the following command:

npm run start

This will open the React Native Packager, which will allow us to test the app on both virtual and physical devices. Once the app is running on the device, you should see the text that was passed to the component.

Conclusion

In this tutorial, we have covered how to use TypeScript with React Native to create a cross-platform mobile application. We have gone through setting up the project, writing the code, and testing the application. Using TypeScript with React Native provides a reliable way to create robust, maintainable, and scalable applications.