index.html

<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <script defer data-domain="stream-time.xyz" src="https://plausible.storetastic.cloud/js/script.js"></script>
    <script type="text/javascript" src="main.js"></script>
</head>

<body>
    <div id="app"></div>

    <script type="text/javascript">
        // Extract data from local storage.
        const data = localStorage.getItem('data');
        const flags = data ? JSON.parse(data) : null;

        // Init Elm app, passing in the stored data as flags.
        const app = Elm.Main.init({
            node: document.getElementById('app'),
            flags: flags
        });

        // Listen for commands from the `setStorage` port and persist data to local storage.
        app.ports.setStorage.subscribe(function (state) {
            localStorage.setItem('data', JSON.stringify(state));
        });

        // Listen for commands from the `removeStorage` port and remove local storage data.
        app.ports.removeStorage.subscribe(function () {
            localStorage.removeItem('data');
        });
    </script>
</body>

</html>