firebase google sign in react

Firebase Google Sign-In in React

If you're building a web application using React, you might want to implement authentication with Firebase. One of the authentication options Firebase offers is Google Sign-In. Here's how you can implement it:

Step 1: Set up Firebase

The first thing you need to do is set up a Firebase project and enable Google Sign-In in the Firebase console. You'll also need to add the Firebase SDK to your React project by running the following command:

$ npm install firebase

Then, initialize Firebase in your React app by adding the following code to your index.js file:

import firebase from 'firebase/app';
import 'firebase/auth';

firebase.initializeApp({
  // Your Firebase config goes here
});

Step 2: Implement the Google Sign-In Button

Next, you'll need to add the Google Sign-In button to your login page. You can use the FirebaseUI library to easily add the button to your app:

$ npm install firebaseui --save

Then, import the library in your login component and render the Google Sign-In button:

import * as firebaseui from 'firebaseui';
import 'firebaseui/dist/firebaseui.css';

const ui = new firebaseui.auth.AuthUI(firebase.auth());

class Login extends React.Component {
  componentDidMount() {
    ui.start('#firebaseui-auth-container', {
      signInOptions: [
        firebase.auth.GoogleAuthProvider.PROVIDER_ID
      ],
      signInSuccessUrl: ''
    });
  }

  render() {
    return (
      
    );
  }
}

This will render a Google Sign-In button that users can click to sign in with their Google account.

Step 3: Handle the Sign-In Callback

When a user signs in with Google, Firebase will redirect them to the signInSuccessUrl you specified in the previous step. You'll need to handle this redirect and get the user's credentials:

class LoginCallback extends React.Component {
  componentDidMount() {
    firebase.auth().getRedirectResult()
      .then((result) => {
        // The signed-in user info.
        const user = result.user;
        console.log(user);
      })
      .catch((error) => {
        console.log(error);
      });
  }

  render() {
    return null;
  }
}

This code will get the user's credentials and log them to the console. You can then use these credentials to authenticate the user in your app.

That's it! With these three steps, you can easily implement Google Sign-In with Firebase in your React app.