flask_ipam/app/templates/panel/_nav.html

<nav class="navbar navbar-expand-lg bg-dark bg-body-tertiary" data-bs-theme="dark">
    <div class="container-fluid">
        <a class="navbar-brand" href="#">Flask IPAM</a>
        <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
            <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="navbarSupportedContent">
            <ul class="navbar-nav me-auto mb-2 mb-lg-0">
            <li class="nav-item">
                <a class="nav-link {% if is_dash %}active{% endif %}" href="{{ url_for('base.dashboard') }}">Dashboard</a>
            </li>
            <li class="nav-item dropdown">
                <a class="nav-link dropdown-toggle" role="button" data-bs-toggle="dropdown" aria-expanded="false">Network</a>
                <ul class="dropdown-menu">
                    <li><a class="dropdown-item" href="#">Subnets</a></li>
                    <li><a class="dropdown-item" href="#">Attributions</a></li>
                </ul>
            </li>
                <li class="nav-item dropdown">
                    <a class="nav-link dropdown-toggle" role="button" data-bs-toggle="dropdown" aria-expanded="false"><i class="bi bi-archive-fill"></i> Inventory</a>
                    <ul class="dropdown-menu">
                        <li><a class="dropdown-item" href="#"><i class="bi bi-pc-display"></i> Computers</a></li>
                        <li><a class="dropdown-item" href="#"><i class="bi bi-server"></i> Servers</a></li>
                        <li><a class="dropdown-item" href="#"><i class="bi bi-server"></i> Virtual Machines</a></li>
                        <li><a class="dropdown-item" href="#"><i class="bi bi-ethernet"></i> Networks Devices</a></li>
                        <li><a class="dropdown-item" href="#"><i class="bi bi-collection"></i> Others</a></li>
                    </ul>
                </li>
                {% if current_user.admin %}
                <li class="nav-item">
                    <a class="nav-link active" href="">Admin</a>
                </li>
                {% endif %}
            </ul>
            <form class="d-flex" role="search">
                <a class="btn btn-outline-warning" type="submit" href="{{ url_for('auth.logout') }}">logout</a>
            </form>
        </div>
    </div>
</nav>