fb-auth.js

window.fbAsyncInit = function () {
  FB.init({
    appId: '165818190981328',
    cookie: true,
    xfbml: true,
    version: 'v3.2'
  });

  FB.AppEvents.logPageView();

};

(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'));

$(document).ready(function () {
  $('#signin-facebook-btn').click(function (event) {
    event.preventDefault();
    let provider = new firebase.auth.FacebookAuthProvider();

    firebase.auth().signInWithPopup(provider).then(function (result) {
      var token = result.credential.accessToken;
      var user = result.user;

      window.location = 'home.html';

      console.log(result)

    }).catch(function (error) {
      var errorCode = error.code;
      var errorMessage = error.message;
      var email = error.email;
      var credential = error.credential;

      console.log(errorCode)
      console.log(errorMessage)
      console.log(email)
      console.log(credential)
    });

  })
})