Firebase offers a great number of options to implement Login in your app. Some of which are:
- Using Email.
- Using Phone number.
- Using Facebook.
- Using Google, etc.
The best part is you don’t have to worry about handling the login flow, Firebase takes care of it.
Approach:
First of all, create a Firebase project by following these steps:
- Go to https://console.firebase.google.com/ and login with your google account.
- Create a project on Firebase.
- Add Firebase Software Development Kit(SDK) in your App.
<!– Insert these scripts inside your body tag –>
<body>
<!–This is the most important script that has to be added –>
<script src=”/__/firebase/7.14.4/firebase-app.js”></script>
<!– In order to use Google login add this script –>
<script src=”/__/firebase/7.14.4/firebase-auth.js”></script>
</body>
- Now that we have added these scripts in our app, we will now initialize the Firebase in our app.
- In the Firebase console go to the app settings, from there copy App config object and paste it in your code.
- App config object looks like this.
var firebaseConfig = {
apiKey: "your-api-key",
authDomain: "your-project-id.firebaseapp.com",
databaseURL: "https://your-project-id.firebaseio.com",
projectId: "your-project-id",
storageBucket: "your-project-id.appspot.com",
messagingSenderId: "the-sender-id",
appId: "the-app-id",
measurementId: "G-measurement-id",
};
- If you followed these steps correctly your app will be registered with Firebase.
Now we will enable Facebook login in our app by following these steps:
- Open Facebook for developers, and create a new app.
- After the app is created, go to the basic settings and you can get your App Id and an app secret from there.
- Go to the Firebase console and open Auth section
- Enable Facebook sign on the sign in method tab and enter your App Id and App secret there.
- Firebase will provide you with your OAuth redirect URI, update this URI in Facebook settings:
Product -> Settings -> Valid OAuth Redirect URIs. - In your app create a Facebook provider object to handle login flow.
const FacebookAuth = new firebase.auth.FacebookAuthProvider();
- Authenticate user by using the instance of object that you created with the Firebase.
- You can either redirect the user to sign in page or open a pop-up window.
firebase.auth().signInWithPopup(FacebookAuth); //To sign in with pop-up.
firebase.auth().signInWithRedirect(FacebookAuth);//To sign in with redirect.
- Facebook Login method is implemented in your app, now you are good to go.
Example:
We will create a simple react based web app with just the login button.
Code for the button component:
Javascript
import React, { Component } from "react";
import firebase from 'firebase';
class tutorial extends Component{
render(){
return(
<div>
<button> {
const FacebookAuth =
new firebase.auth.FacebookAuthProvider();
firebase.auth().signInWithPopup(FacebookAuth);
}} >
Sign in with Facebook
</button>
</div>
);
}
}
export default tutorial;
|
Code for your Firebase.ts file:
Javascript
import * as firebase from 'firebase';
const firebaseConfig = {
apiKey: "****",
authDomain: "****.firebaseapp.com",
databaseURL: "https://*****.firebaseio.com", projectId: "****",
storageBucket: "****.appspot.com",
messagingSenderId: "****",
appId: "****",
measurementId: "****"
};
class Firebase {
constructor() {
firebase.initializeApp(firebaseConfig);
}
}
export default Firebase;
|
Output:
