Роман Александрович

import React from 'react'
import {View, Text, StyleSheet} from 'react-native'
import {WebView} from 'react-native-webview'

export const Browser = props => {
    return (
        <View style={{flex:1, width:"100%",height:"100%"}}>
            <WebView source={{uri: 'http://facebook.com/'}} style={{flex:1}} javaScriptEnabled={true} />
        </View>
    )
}

const singers = [
  { name: 'Steven Tyler', band: 'Aerosmith', born: 1948 },
  { name: 'Karen Carpenter', band: 'The Carpenters', born: 1950 },
  { name: 'Kurt Cobain', band: 'Nirvana', born: 1967 },
  { name: 'Stevie Nicks', band: 'Fleetwood Mac', born: 1948 },
];

function compareValues(key, order = 'asc') {
  return function innerSort(a, b) {
    if (!a.hasOwnProperty(key) || !b.hasOwnProperty(key)) {
      // property doesn't exist on either object
      return 0;
    }

    const varA = (typeof a[key] === 'string')
      ? a[key].toUpperCase() : a[key];
    const varB = (typeof b[key] === 'string')
      ? b[key].toUpperCase() : b[key];

    let comparison = 0;
    if (varA > varB) {
      comparison = 1;
    } else if (varA < varB) {
      comparison = -1;
    }
    return (
      (order === 'desc') ? (comparison * -1) : comparison
    );
  };
}

// array is sorted by band, in ascending order by default
singers.sort(compareValues('band'));

// array is sorted by band in descending order
singers.sort(compareValues('band', 'desc'));

const ComponentDiv = () => {
    const styleBlue = {
        color: "blue"
    }
    const styleRed = {
        color: "red"
    }
    return (

        <div style={true?styleBlue:styleRed}> //вместо true доставьте свою переменную
            hello
        </div>

    )
}

export default ComponentDiv;

Our custom Firebase token will expire in 3600 seconds (1 hour). This is only half as long as our default Auth0 access token lifetime (which is 7200 seconds, or 2 hours).

var user = firebase.auth().currentUser;
var name, email, photoUrl, uid, emailVerified;

if (user != null) {
  name = user.displayName;
  email = user.email;
  photoUrl = user.photoURL;
  emailVerified = user.emailVerified;
  uid = user.uid;  // The user's ID, unique to the Firebase project. Do NOT use
                   // this value to authenticate with your backend server, if
                   // you have one. Use User.getToken() instead.
}