# TypeScript Example

<p>
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  <!-- Android -->
  <img alt="Supports Expo Android" longdesc="Supports Expo Android" src="https://img.shields.io/badge/Android-4630EB.svg?style=flat-square&logo=ANDROID&labelColor=A4C639&logoColor=fff" />
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</p>

```sh
npx create-react-native-app -t with-typescript
```

TypeScript is a superset of JavaScript which gives you static types and powerful tooling in Visual Studio Code including autocompletion and useful inline warnings for type errors.

## 🚀 How to use

#### Creating a new project

- Install the CLI: `npm i -g expo-cli`
- Create a project: `npx create-react-native-app -t with-typescript`
- `cd` into the project

### Adding TypeScript to existing projects

- Create a blank TypeScript config: `touch tsconfig.json`
- Run `yarn start` or `npm run start` to automatically configure TypeScript
- Rename files to TypeScript, `.tsx` for React components and `.ts` for plain typescript files

> 💡 You can disable the TypeScript setup in Expo CLI with the environment variable `EXPO_NO_TYPESCRIPT_SETUP=1 expo start`

## 📝 Notes

- [Expo TypeScript guide](https://docs.expo.dev/versions/latest/guides/typescript/)