index.html

<html>
    <head>
        <link href="//fonts.googleapis.com/css?family=Raleway:400,300,600" rel="stylesheet" type="text/css">
        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/8.0.1/normalize.min.css" type="text/css">
        <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/skeleton/2.0.4/skeleton.min.css" type="text/css">

        <script>
            function loadFirebase(config) {
                firebase.initializeApp(config);
                localStorage.setItem('validConfig', 'true');
                $('.setup-step').hide();
                $('#loaded-part').show();

                firebase.auth().onAuthStateChanged(function(user) {
                    if (user) {
                        user.getIdToken().then(function(token) {
                            const userData = {
                                uid: user.uid,
                                displayName: user.displayName,
                                email: user.email,
                                phoneNumber: user.phoneNumber
                            };
                            $('#user').text(JSON.stringify(userData, null, 2));
                            $('#result').text(token)
                            $('#jwtio').show();
                            $('#jwtio').attr('href', `https://jwt.io/#debugger-io?token=${token}`);
                        })
                    }
                });
            }
        </script>
        <style>
            .header {
                margin-top: 6rem;
                text-align: center;
            }

            .page-section {
                border-top: 1px solid #eee;
                padding: 4rem 0;
                margin-bottom: 0;
            }

            .page-section h3 {
                text-transform: uppercase;
                font-size: 1.4rem;
                letter-spacing: .2rem;
                font-weight: 600;
            }

            .form {
                margin-top: 1rem;
            }

            .icon {
                height: 1.2rem;
                fill: #222;
            }

            a .icon {
                fill: #1EAEDB;
            }

            /* for pretty printing code/jwt */
            .prettyprint {
                background: #fff;
                font-family: Menlo, 'Bitstream Vera Sans Mono', 'DejaVu Sans Mono', Monaco, Consolas, monospace;
                font-size: 1.2rem;
                padding: 2.5rem 3rem;
                -webkit-font-smoothing: antialiased;
            }

            .jwt {
                white-space: pre-wrap;      /* CSS3 */   
                white-space: -moz-pre-wrap; /* Firefox */    
                white-space: -pre-wrap;     /* Opera <7 */   
                white-space: -o-pre-wrap;   /* Opera 7 */    
                word-wrap: break-word;      /* IE */
                width: 100%;
                margin: 1rem 0;
                display: block;
            }

            .user-json {
                overflow: scroll;
            }
            
            .code-example-body {
                white-space: pre;
                word-wrap: break-word;
            }
        
            .github-fork {
                position: absolute;
                top: 0;
                right: 0;
            }
        </style>
    </head>
    <body> 
        <a class="github-fork" target="_blank" href="https://github.com/ddikman/firebase-jwt"><img loading="lazy" width="149" height="149" src="https://github.blog/wp-content/uploads/2008/12/forkme_right_darkblue_121621.png?resize=149%2C149" class="attachment-full size-full" alt="Fork me on GitHub" data-recalc-dims="1"></a>        
        <div class="container">
            <section class="header">
                <h2 class="title">Firebase JWT</h2>
                <p>
                    Tiny tool to generate JWT tokens.
                </p>
            </section>
            <div class="page-section setup-step">
                <h3>Before getting started</h3>
                <p>You can check the code, this tool never sends anything to any backend aside from google. It saves some inputs to make it easier to use in local storage but it's not doing anything with these. But always use extreme caution, download, check the code and run locally if you're unsure!</p>
            </div>
            <div class="page-section setup-step">
                <h3>Setup project</h3>
                <p>
                    You'll find these settings by opening <a href="http://console.firebase.google.com/">http://console.firebase.google.com/</a> and navigating to <code>Project overview / Project settings</code>.
                </p>
                <img src="project-settings.png" style="margin: 3rem; width: 50%;" />
                <form class="form">
                    <div class="row">
                        <div class="six columns">
                            <label for="project-id">Project id</label>
                            <input placeholder="project-id" class="remember-input u-full-width" type="text" id="project-id" />
                          
                        </div>
                        <div class="six columns">
                          <label for="api-key">API key</label>
                          <input placeholder="api-key" class="remember-input u-full-width" type="password" id="api-key" />
                        </div>
                    </div>
                    <p><button id="load" class="button-primary">Connect project</button></p>
                </form>
                
            </div>
            <div id="loaded-part" style="display: none;">
                <div class="page-section">
                    <h3>Google login</h3>
                    <p>As you expect, just that one button.</p>
                    <p><button id="google-signin">Login with google</button></p>
                </div>
                <div class="page-section">
                    <h3>Email login</h3>
                    <div class="row">
                        <div class="six columns">
                            <label for="email">Email</label>
                            <input placeholder="your@email.com" class="remember-input u-full-width" type="email" id="email" />
                        </div>
                        <div class="six columns">
                            <label for="password">Password</label>
                            <input type="password" class="u-full-width" id="password" />
                        </div>
                        <button id="email-signin">Login with email</button>
                    </div>
                </div>
                <div class="page-section">
                    <h3>Phone number login</h3>
                    <p>This one is a bit tricky, first you need to enter your phone number, then a captcha and then you'll get a code sent to your phone to validate with.</p>
                    <div id="phone-step-1">
                        <p>The user's phone number in E.164 format (e.g. +16505550101).</p>
                        <input class="remember-input" type="text" id="phonenumber"/> 
                        <button id="phone-getcode">Phone code</button>
                        <div id="recaptcha-container"></div>
                    </div>
                    <div id="phone-step-2" style="display: none">
                        <label for="phonecode">Verification code</label>
                        <input type="number" id="phonecode"/>
                        <button id="phone-signin">Login with phone number</button>
                    </div>
                </div>
                <div class="page-section">
                    <h3>Current login</h3>
                    <pre><code class="user-json" id="user"></code></pre>
                    <code id="result" class="jwt"></code>
                    <a target="_blank" id="jwtio" style="display: none;" href="">View token contents in JWT.io</a>
                </div>
                 <div class="page-section">
                     <h3>Change project</h3>
                     <p>Pressing this will clear your local session and refresh the page allowing you to select a different project.</p>
                     <button id="switch-project">Logout firebase project</button>
                 </div>
            </div>
            <div class="page-section">
                <h3>Source</h3>
                <p>
                    This tool is set together by <a target="_blank" href="https://twitter.com/almundgrey">David <svg class="icon" viewBox="0 0 512 512"><g><path d="M512,100c0,1,0,2,0,3c-0.286,0.144-0.678,0.213-0.843,0.444c-12.988,18.134-28.416,33.907-45.899,47.727c-1.117,0.883-2.077,2.606-2.191,4.012c-0.803,9.932-1.033,19.92-2.083,29.822c-1.466,13.833-2.476,27.829-5.44,41.37c-14.968,68.364-47.628,126.547-101.357,172.138c-38.719,32.854-83.248,53.526-133.219,62.461c-8.297,1.483-16.643,2.691-24.966,4.027c-21.667,0-43.333,0-65,0c-6.005-0.986-12-2.043-18.017-2.947c-38.1-5.724-73.019-20.017-106.071-39.338c-1.137-0.664-2.119-1.592-3.174-2.396c0.036-0.494,0.072-0.988,0.108-1.482c55.033,4.465,105.085-8.256,149.475-42.204c-45.885-6.43-78.15-29.625-94.769-73.517c5.615,0,10.368,0.022,15.12-0.006c4.832-0.029,9.677,0.091,14.492-0.223c4.535-0.295,9.04-1.07,13.558-1.634c-59.936-17.467-83.246-74.124-78.912-104.888c13.575,6.847,27.734,11.166,43.121,11.612c-20.952-16.59-35.308-37.341-40.662-63.445c-5.325-25.967-2.189-50.979,11.493-75.753c57.54,65.903,128.3,104.011,215.511,109.404c0-14.21-1.604-27.562,0.309-40.389c5.197-34.848,24.9-60.248,55.821-76.352C318.775,56.04,330.755,53.726,342,50c8.667,0,17.333,0,26,0c0.753,0.291,1.497,0.808,2.261,0.839c10.134,0.412,19.371,4.007,28.571,7.834c10.89,4.53,20.224,11.34,28.906,19.186c3.154,2.85,6.411,4.546,11.24,3.473c17.612-3.914,33.97-11.042,50.23-18.523c3.07-1.413,6.197-2.702,10.545-4.59c-8.316,23.453-22.797,40.565-40.623,55.441C477.73,112.015,494.891,106.107,512,100z"></path></g></svg></a> using <a target="_blank" href="https://firebase.google.com/docs/reference/js">Firebase web SDK</a> and the <a target="_blank" href="http://getskeleton.com/">Skeleton</a> css framework.
                </p>
            </div>
        </div>
        

        <!-- Load all of firebase -->
        <script src="https://www.gstatic.com/firebasejs/8.3.2/firebase-app.js"></script>
        <script src="https://www.gstatic.com/firebasejs/8.3.2/firebase-auth.js"></script>
        <script src="https://code.jquery.com/jquery-3.6.0.slim.min.js"></script>

        <script>
            let config = {};

            $(document).ready(function(){
                function rememberInput(elementId) {
                    const selector = `#${elementId}`;
                    $(selector).val(localStorage.getItem(elementId));
                    $(selector).on('blur', function() {
                        localStorage.setItem(elementId, $(selector).val());
                    })
                } 

                $('.remember-input').each(function(_, element) {
                    rememberInput(element.id);
                })

                function buildConfig() {
                    const id = $('#project-id').val();
                    config = {
                        projectId: id,
                        authDomain: `${id}.firebaseapp.com`,
                        apiKey: $('#api-key').val()
                    }
                }

                for (let configElement of ['#project-id', '#api-key']) {
                    $('#project-id').on('change', function() {
                        buildConfig();
                    })
                }

                $('#load').on('click', function(){
                    try {
                        loadFirebase(config);

                        $('#result').text('Done!');
                    } catch(e) {
                        $('#result').text(e);
                    }
                });

                function handleAuthError(error) {
                    if (error.code === "auth/unauthorized-domain") {
                        const authDomain = firebase.auth().app.options.authDomain;
                        const projectName = authDomain.replace('.firebaseapp.com', '');
                        $('#result').html(`<p>${error.message}</p><p><a target="_blank" href="https://console.firebase.google.com/u/0/project/${projectName}/authentication/providers">Open</a></p>`);
                        return;
                    }
                    $('#result').text(error.message);
                }

                $('#google-signin').on('click', function() {
                    var provider = new firebase.auth.GoogleAuthProvider();
                    firebase.auth().signInWithPopup(provider).then(function() {}, handleAuthError);
                })

                $('#email-signin').on('click', function() {
                    var cred = firebase.auth().signInWithEmailAndPassword(
                        $('#email').val(),
                        $('#password').val()
                    ).then(function(){}, handleAuthError);
                })

                $('#email-signin').on('click', function() {
                    var cred = firebase.auth().signInWithEmailAndPassword(
                        $('#email').val(),
                        $('#password').val()
                    ).then(function(){}, handleAuthError);
                })

                $('#phone-getcode').on('click', function(){
                    const recaptchaVerifier = new firebase.auth.RecaptchaVerifier('recaptcha-container');
                    firebase.auth().signInWithPhoneNumber(
                        $('#phonenumber').val(),
                        recaptchaVerifier
                    ).then(function(result) {
                        $('#phone-signin').unbind('click');
                        $('#phone-step-1').hide();
                        $('#phone-step-2').show();
                        $('#phone-signin').on('click', function() {
                            result.confirm($('#phonecode').val())
                        });
                    });
                })

                $('#switch-project').on('click', function() {
                    localStorage.removeItem('validConfig');
                    location.reload();
                })

                buildConfig();
                if (localStorage.getItem('validConfig')) {
                    loadFirebase(config);
                }
            })
        </script>
    </body>
</html>