firebase use --add code example

Example 1: firebase cli windows

npm install -g firebase-tools

Example 2: add firebase in react

import * as firebase from 'firebase'

const firebaseConfig = {
    apiKey: "AIzaSyC6EDL8gMkZc3GGzGveMqWe5zvAr5DNiL4",
    authDomain: "blood-components.firebaseapp.com",
    databaseURL: "https://blood-components.firebaseio.com",
    projectId: "blood-components",
    storageBucket: "blood-components.appspot.com",
    messagingSenderId: "388223113819",
    appId: "1:388223113819:web:1273570a12add0fedafd7e",
    measurementId: "G-K6NM078FWD"
};

// Initialize Firebase
firebase.initializeApp(firebaseConfig);
const auth = firebase.auth();
const db = firebase.firestore();

//initiating references to the databases
const usersRef = db.collection('users')

// for privileges purposes
const functions = firebase.functions();

//google provider sign-in
const googleProvider = new firebase.auth.GoogleAuthProvider();


export { firebase, db, auth, functions, googleProvider }

Example 3: add to firebase database

db.collection("cities").add({
    name: "Tokyo",
    country: "Japan"
})
.then(function(docRef) {
    console.log("Document written with ID: ", docRef.id);
})
.catch(function(error) {
    console.error("Error adding document: ", error);
});

Example 4: firebase tools install

installing firebase tools