js__react_native__fb/App.js

import React, { Component } from 'react';
import {
  // AppRegistry,
  Image,
  StyleSheet,
  Text,
  View
} from 'react-native';

const styles = StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: '#f92',
    alignItems: 'center',
    justifyContent: 'center',
  },
});

class App extends Component {
  render() {
    return (
      <View style={styles.container}>
        <Text>Open up App.js to start working on your app!</Text>
        <Text>Changes you make will automatically reload.</Text>
        <Text>Shake your phone to open the developer menu.</Text>
      </View>
    );
  }
}


class Bananas extends Component {
  render() {
    const pic = {
      uri: 'https://upload.wikimedia.org/wikipedia/commons/d/de/Bananavarieties.jpg',
    };
    const img = (
      <Image source={pic} style={{
        backgroundColor: 'orange',
        height: 110,
        opacity: 0.9,
        width: '100%',
      }} />
    );

    return (
      img
    );
  }
}

class Greeting extends Component {
  render() {
    return (
      <Text>Hello {this.props.name}!</Text>
    );
  }
}

class LotfOfGreetings extends Component {
  render() {
    return (
      <View style={styles.container}>
        <Greeting name="Rexxar" />
        <Greeting name="Jaina" />
        <Greeting name="Valeera" />
      </View>
    );
  }
}

class Blink extends Component {
  constructor(props) {
    super(props);
    this.state = { isShowingText: true };

    setInterval(() => {
      this.setState(previousState => ({
        isShowingText: !previousState.isShowingText,
      }));
    }, 1000);
  }

  render() {
    const display = this.state.isShowingText
      ? this.props.text
      : ' ';


    return (
      <Text>{display}</Text>
    );
  }
}

export default class BlinkApp extends Component {
  render() {
    return (
      <View style={styles.container}>
        <Blink text="I love to blink" />
        <Blink text="Yes blinking is so great" />
        <Blink text="Why did they ever take this out of HTML" />
        <Blink text="Look at me look at me look at me" />
      </View>
    );
  }
}

// skip this line if using Create React Native App
// AppRegistry.registerComponent('AwesomeProject', () => Bananas);