index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Steueridentifikationsnummer - Beispielgenerator</title>

    <style>
        body {
            background: #415281;
            color: #b9c8cd;

            font-family: "Arial Black", sans-serif;

            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;

            height: 90vh;
        }

        h1 {
            font-family: Arial, sans-serif;
        }

        #example-steuer-id {
            margin-top: 10px;
            font-size: 72pt;
            font-weight: bold;
        }

        #new-id {
            font-size: 24pt;
            padding: 0.5em 0.7em;
            border: none;
            border-radius: 0.5em;

            background: #c1c9df;
            color: #283557;
            cursor: pointer;
        }

        @media (max-width: 900px) {
            #example-steuer-id {
                font-size: 48pt;
            }
        }

        footer {
            margin-top: 3em;
        }

        a {
            color: cornflowerblue;
        }

        a:visited {
            color: #7969a9;
        }
    </style>
</head>
<body>

    <h1>Steuerliche Identifikationsnummer (Beispiel)</h1>

    <p id="example-steuer-id"></p>
    <button id="new-id">Neu generieren</button>

    <footer>
        Von <a href="http://nikolassv.de" target="_blank">Nikolas Schmidt-Voigt</a>
        - Git-Repository: <a href="https://github.com/nikolassv/steuerid-generator">https://github.com/nikolassv/steuerid-generator</a>
    </footer>

    <script src="steuerId.js"></script>
    <script>
        const element = document.getElementById('example-steuer-id');

        document.getElementById('new-id').onclick = regenerate;

        regenerate();

        function regenerate() {
            const digits = createSteuerIdDigits();
            element.innerText = digits.join('');
        }
    </script>
</body>
</html>