lebd/templates/default-layout.hamlet

<header>
    <nav .navbar .navbar-expand-lg .navbar-dark.bg-dark>
        $maybe title <- appTitle $ appSettings master
            <a .navbar-brand href=@{HomeR}>#{title}
        <button type="button" .navbar-toggler data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar" aria-label="Toggle navigation">
            <span .navbar-toggler-icon>

        <div #navbar .collapse.navbar-collapse>
            <ul .navbar-nav.mr-auto>
                $forall MenuItem label route _ <- navbarLeftFilteredMenuItems
                    <li .nav-item :Just route == mcurrentRoute:.active>
                        <a .nav-link href=@{route}>#{label}

            <ul .navbar-nav>
                $forall MenuItem label route _ <- navbarRightFilteredMenuItems
                    <li .nav-item :Just route == mcurrentRoute:.active>
                        <a .nav-link href=@{route}>#{label}
    $if not $ null parents
        <ul .breadcrumb.rounded-0>
            $forall bc <- parents
                <li .breadcrumb-item>
                    <a href=@{fst bc}>#{snd bc}
            <li .breadcrumb-item.active>#{title}
    $maybe msg <- mmsg
      <div .alert.alert-info #message>#{msg}

<main>
    ^{widget}

<!-- Footer -->
<footer>
    <div .container>
        <p .text-muted>
            All content on this site is licensed under a
            <a rel="license" href="//creativecommons.org/licenses/by-sa/4.0/">Creative Commons Attribution-ShareAlike 4.0 International License</a>.