Creating & Managing Users with Google Firebase + Domain Validator

This supports a software dev. class for businesspeople that you can find here: https://www.alexandercowan.com/making-html-manageable And a case you can find here: https://www.alexandercowan.com/making-html-manageable

by sk8wt

HTML

<script src="https://www.gstatic.com/firebasejs/4.13.0/firebase.js"></script>
<script>
  // Initialize Firebase
  var config = {
    apiKey: "AIzaSyBX_hyilSvXt0bE5fn3kUae-MJzU8qBuzI",
    authDomain: "fir-case-prototype.firebaseapp.com",
    databaseURL: "https://fir-case-prototype.firebaseio.com",
    projectId: "fir-case-prototype",
    storageBucket: "",
    messagingSenderId: "474114067786"
  };
  firebase.initializeApp(config);
</script>

<div class="top-bar">
	<ul class="nav-list">
  	<li><a href="#">Home</a></li>
  	<li><a href="#">Help</a></li>
	</ul>

<!-- Code to implement search functionality -->
 <input type="text" name="parts-search" placeholder="Mfg., Model, or Part #" size=20 id="input"> 

<button id="clickme" type="button" onclick="search()" value="Search">Search</button>
    
		
	<div id="auth-control">
		<img src="https://www.alexandercowan.com/wp-content/uploads/2018/04/login-icon.png" alt="auth" style="width:30px;float: left;">
		<ul class="nav-list">
		<li id="login-trigger"><a href="#" id="auth-text">Log In</a></li>
		</ul>
		
		<div id="login-content">
		<!-- On Forms: -->
		<!-- onsubmit="return false" will stop the form submission but allow us to pick up the submission in JQuery with $('#login-form').submit(), 		otherwise JSFiddle can break. -->

			<!-- allows us to easily switch between login and registration //removed for new approach -->
		<!--	<input type='checkbox' id='form-switch'>  -->

        <div align="right">
			<!-- Login -->
			<form id='login-form' method='post' onsubmit="return false">
				<input type="text" placeholder="Email" id="login_email" required>
				<input type="password" placeholder="Password" id="login_pwd" required> 


				<button type='submit'>Log In</button>
				<a id='forgotten-link'>Forgot Password?</a>
				<h3><a class='auth-link' id='register-link'>Register</a></h3>
            
        </div>
			</form>

			<!-- Registration -->
			<form id='register-form' method='post' onsubmit="return...

CSS

.top-bar, #search-box, .nav-list li, .nav-list a {
	background-color: #002D45;
	font-family:Proxima Nova,helvetica neue,helvetica,sans-serif;
	font-weight: bold;
	font-size: 110%;
	color: #ffffff;
}

.top-bar {
	color: #FFFFFF;
	height: 40px;
	margin: 0px;
	padding: 10px;
    display: flex;
    align-items: center;
}

.nav-list {
    list-style-type: none;
    padding: 0;
		display: inline;

}

.nav-list li {
	    float: left;
}

.nav-list a {
    display: inline;
    padding: 8px;
		text-decoration: none;
}

#search-box {
	margin-left:auto; 
	margin-right:0;
	padding: 10px;
 }
 
 #login-content {
  display: none;
  position: absolute;
	margin-right: 10px;
  top: 60px;
  right: 0;
	left: 1000;
  z-index: 999;    
  background: #ffffff; 
  padding: 15px;
	border:1px solid #CCC;
  width:200px;
}

/* Keeps this in sync w/ the login-content div*/
#login-form {
  display: none;
}

 #login-content input {
  margin-bottom:3px;
  padding:10px;
  width: 90%;
  border:1px solid #CCC
}

 #login-content label {
  cursor:pointer;
  font-family:Proxima Nova,helvetica neue,helvetica,sans-serif;
	color: #002D45;
}

 #login-content #register-form {
  display:none
}

 #login-content #forgotten-form {
  display:none
}

 #login-content, #after-reset, #if-error, #if-reg-error {
  display:none
}

 #login-content .auth-link {
  cursor:pointer;
  font-family:Proxima Nova,helvetica neue,helvetica,sans-serif;
	color: #002D45;
}

#forgotten-link, #reset-response, #after-reset, #login-link-modal, #if-error, #if-reg-error {
  cursor:pointer;
  font-family:Proxima Nova,helvetica neue,helvetica,sans-serif;
	color: #002D45;
	font-size: 80%;
}

#login-link-modal {
	font-size: 120%;
}

#toggle-search {
  position: relative;
  padding: 5px 0px;
  height: 100%;
  width: 100%;
 }

#toggle-search img {
  margin-left: 94%;
 }

#search-controls {
	background-color: #ffffff;
	padding: 5px 15px 15px 15px;
	font-family:Proxima Nova,helvetica neue,helvetica,sans-serif;
	font-size: 70%;
  display: flex;
 ...

JavaScript

//Code That Deals with Transitioning the State of the Log In/Auth Pane
$('#register-link').click(function() {
	$('#login-form').toggle(); 
	$('#register-form').toggle(); 
});

$('#forgotten-link').click(function() {
	$('#forgotten-form').show(); 
	$('#before-reset').show(); 	
	$('#login-form').hide(); 
});

$('#login-link-modal').click(function() {
	$("#after-reset").hide();
	$('#login-form').show(); 
});

$('#login-trigger').click(function() {	
	handle_auth();
});

//Code that deals with initial display for modal pane that deals with authentication and, for a user that's logged in, logging them out.
function handle_auth() {
//The function below lets us know if/who is logged in- you can read more about it here: https://firebase.google.com/docs/auth/web/manage-users. 
var user = firebase.auth().currentUser;
console.log("dealing with " + user); 
	
if (!user) {
	//If there's no user (user var is null)  
	$('#login-content').toggle();
  //Reset/hide other forms and div's so the login page displays right.
  $('#register-form').hide();
  $('#before-reset').hide(); 
  $("#after-reset").hide();
  $("#if-error").hide();
  $('#login-form').show();
} else {
// Sign out the current user
firebase.auth().signOut().then(function() {
// Sign-out successful.
console.log("Signed out " + user.email) 
	}).catch(function(error) {
	// An error happened.
	alert("Something went wrong.");
	});
	$("#auth-text").text("Log In");
	}
}

//This listens for a submit event on the login form. For more on this type of event, see https://api.jquery.com/submit/. It then passes the inputs to the function you see below it. 
$('#login-form').submit(function(){
	// pass the login email and pwd to our login handler function (below)
	login_user($('#login_email').val(), $('#login_pwd').val());
});

function login_user(email, pwd) {
	console.log("attempting to login user " + email); 
  
  // use the Firebase API to sign in the user
  firebase.auth().signInWithEmailAndPassword(email, pwd).then(function(user)...