ReactJS Facebook Login Popup Trigger on Load Page

Are you looking for a way to trigger Facebook login popup automatically on load page when using ReactJS? Look no further as this article will show you how to do just that!

Prerequisites

Before we get started, you will need to have the following:

• An existing ReactJS project
• A Facebook Developer Account
• A Facebook App ID

Step 1: Installing Dependencies

First, we need to install the following dependencies:

npm install --save react-facebook-login

This package allows us to easily integrate Facebook login into our ReactJS application.

Step 2: Importing Dependencies

Next, we will import the dependencies we installed in Step 1.

import React, { Component } from "react";
import FacebookLogin from "react-facebook-login";

Step 3: Adding Facebook Login Button

Now, we will add a Facebook login button to our ReactJS application. We can do this by adding the following code:

class App extends Component {
  responseFacebook = (response) => {
    console.log(response);
  };

  render() {
    return (
      <div>
        <FacebookLogin
          appId="your-app-id"
          fields="name,email,picture"
          callback={this.responseFacebook}
          cssClass="my-facebook-button-class"
        />
      </div>
    );
  }
}

export default App;

Note that you will need to replace "your-app-id" with your actual Facebook app ID.

Step 4: Triggering Facebook Login Popup

To trigger the Facebook login popup automatically on load page, we will add the following code to our component:

componentDidMount() {
    window.fbAsyncInit = function () {
      window.FB.init({
        appId: "your-app-id",
        cookie: true,
        xfbml: true,
        version: "v12.0",
      });
      window.FB.getLoginStatus(function (response) {
        if (response.status === "connected") {
          console.log(response);
        } else {
          window.FB.login();
        }
      });
    };

    (function (d, s, id) {
      var js,
        fjs = d.getElementsByTagName(s)[0];
      if (d.getElementById(id)) {
        return;
      }
      js = d.createElement(s);
      js.id = id;
      js.src = "https://connect.facebook.net/en_US/sdk.js";
      fjs.parentNode.insertBefore(js, fjs);
    })(document, "script", "facebook-jssdk");
  }

This code will initialize the Facebook SDK, check the login status of the user and trigger the login popup if the user is not already logged in.

That's it! Now you know how to trigger Facebook login popup automatically on load page when using ReactJS. Happy coding!