index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>My Web Browser</title>
    <!-- Include your CSS and other dependencies here -->
</head>
<body>
    <h1>My Web Browser</h1>

    <!-- Your browser interface goes here -->
    <!-- Add buttons, input fields, etc. -->

    <script>
        // Client-side storage using Local Storage
        function saveToLocalStorage(key, value) {
            localStorage.setItem(key, JSON.stringify(value));
        }

        function getFromLocalStorage(key) {
            const storedValue = localStorage.getItem(key);
            return storedValue ? JSON.parse(storedValue) : null;
        }

        // Example usage:
        saveToLocalStorage('userPreferences', { darkMode: true });
        const preferences = getFromLocalStorage('userPreferences');
        console.log('User preferences:', preferences);

        // Database (server-side)
        // Set up your server (e.g., using Node.js and Express)
        // Connect to your database (e.g., MySQL, PostgreSQL, MongoDB)

        // Service Worker for app installation (PWA)
        if ('serviceWorker' in navigator) {
            navigator.serviceWorker.register('/service-worker.js')
                .then(registration => {
                    console.log('Service Worker registered with scope:', registration.scope);
                })
                .catch(error => {
                    console.error('Service Worker registration failed:', error);
                });
        }
    </script>
</body>
</html>