When creating a react native project the app.js file can't be create ?

Question

I type the command in cmd: npx create-expo-app loginHAT when creating the project in the loginHAT folder there is no App.js file? How to fix this error ?

Naimish Makwana · Answer

The command you’re using npx create-expo-app loginHAT is for creating a new Expo project. However starting from Expo SDK 41 the main application file is no longer App.js  but App.tsx instead. This is because Expo has moved to TypeScript for the main application file. If you’re looking for the App.js file you might want to check for App.tsx instead. If you want to use JavaScript instead of TypeScript you can rename App.tsx to App.js and adjust the code accordingly. Here’s a basic App.js content you can start with if you don’t have one: import React from 'react'; import { Text View } from 'react-native'; export default function App() { return ( Hello world! ); } You can replace the content of App.tsx with the above code after renaming it to App.js . Remember to install all the necessary dependencies and run expo start to start your Expo app. Thanks

Dong Lam Trien · Answer

Before I still used the command: npx create-expo-app newproject to create the project in the project folder there was App.js now I use it again without the App.js or App.tsx file I don't know. What is the error that the App.js file cannot be created? Please see the attached image file

Jayraj Chhaya · Answer

When using Expo CLI to create a React Native project the default entry point file is App.js . If the file is missing after project creation it might be due to a version mismatch or an issue during project initialization. To fix this error you can manually create the App.js file in the project directory. Here is an example of how you can create a basic App.js file: import React from 'react'; import { Text View } from 'react-native'; const App = () => { return ( Welcome to My React Native App! ); }; export default App; After creating the App.js file make sure to run the project again to see if the issue is resolved. If the problem persists consider updating Expo CLI or checking for any installation errors during project setup.