expo-cli & React Native

expo-cli

https://reactnative.dev/docs/environment-setup

You will only need a recent version of Node.js(LTS 12+) and a phone or emulator.

install

https://docs.expo.io/get-started/installation

$ npm i -g expo-cli
# yarn
$ yarn global add expo-cli

$ expo -V
# 3.21.13

$ expo init App_RN

$ cd App_RN && npm start
# OR
$ cd App_RN && yarn start
# OR
$ expo start

# you can open iOS, Android, or web from here, or run them directly with the commands below.
$ yarn android
$ yarn ios
$ yarn web

  "scripts": {
    "start": "expo start",
    "android": "expo start --android",
    "ios": "expo start --ios",
    "web": "expo start --web",
    "eject": "expo eject"
  },

https://expo.io/learn

Scan the QR Code with Expo Client App

https://itunes.apple.com/app/apple-store/id982107779

https://play.google.com/store/apps/details?id=host.exp.exponent&referrer=www

tutorial

https://docs.expo.io/tutorial/planning/

online simulator

https://snack.expo.io/

https://snack.expo.io/@xgqfrms/react-native-app

dev & live hot reloading

Expo DevTools is running at http://localhost:19002

Opening DevTools in the browser... (press shift-d to disable)

To run the app with live reloading, choose one of:

• Scan the QR code above with the Expo app (Android) or the Camera app (iOS).

• Press a for Android emulator, or i for iOS simulator, or w to run on web.

• Press e to send a link to your phone with email.

• Press s to sign in and enable more options.

press Ctrl+C to exit.

Expo Press ? to show a list of all available commands.

› Press a to run on Android device/emulator, or i to run on iOS simulator, or w to run on web.

› Press c to show info on connecting new devices.

› Press d to open DevTools in the default web browser.

› Press shift-d to disable automatically opening DevTools at startup.

› Press e to send an app link with email.

› Press p to toggle production mode. (current mode: development)

› Press r to restart bundler, or shift-r to restart and clear cache.

› Press o to open the project in your editor.

› Press s to sign out. (Signed in as @xgqfrms.)

Expo client app & scan QR code

https://reactnative.dev/docs/environment-setup

bug

OK

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