Setup NODE.JS and NPM install behind a web proxy

Check your settings with:

npm config list

Settings behind a proxy:

npm config set registry http://registry.npmjs.org/
npm config set http-proxy http://username:password@ip:port
npm config set https-proxy http://username:password@ip:port
npm config set proxy http://username:password@ip:port
npm set strict-ssl false

Detect Back to Previous Screen on StackNavigator - React Native

//screen A go to screen B, then back

//screenA 

import {DeviceEventEmitter} from "react-native"
componentWillMount() {
    DeviceEventEmitter.addListener('YOUR_LISTENER', (e)=>{})
}

//screenB
DeviveEventEmitter.emit("YOUR_LISTENER",  {})

React Native Sound

// INSTALL

1. npm install react-native-sound --save

   react-native link react-native-sound

// RESOURCE

2. Add file "yoursound.mp3" to Resources folder in iOS XCode project

// CODE 

3. import Sound from "react-native-sound";

4. constructor(props) {

      super(props); 

      Sound.setCategory("Playback");

      mSound = new Sound("yoursound.mp3", Sound.MAIN_BUNDLE); 

   }

5. _playSound() {

      mSound.play(success => {

         if (success) {

            console.log("Success");

         } else {

            console.log("Failure");

            mSound.reset(); 

         } 

      });

   } 

https://github.com/hu2di/react-native-mosquito-sound

React Native: Delete Installed Library

1. rnpm unlink package_name (if library with native content requires linking)
2. npm uninstall --save package_name 

Bài 1: React-Native: Getting Started

https://facebook.github.io/react-native/docs/getting-started.html