WPBulmaNavbarWalker

A WordPress Nav Walker that outputs markup for the Bulma Navbar Component.
Supports sub-menus/dropdowns.

Usage

<nav class="navbar">
  <div class="navbar-brand">
    ...
  </div>
  <div class="navbar-menu">
    <div class="navbar-end"><?php
      if (has_nav_menu('primary_navigation')) {
        wp_nav_menu(array(
          'theme_location' => 'foo',
          'menu_class'     => '',     // ignored
          'container'      => '',     // ignored
          'menu_class'     => '',     // ignored
          'items_wrap'     => '%3$s', // NOT ignored
          'walker'         => new \Bikubi\WPBulmaNavbarWalker\Walker_Nav_Menu
        ));
      }
    ?></div>
  </div>
</nav>

Notes

• Inspired by github.com/ridgey28/WP-Bulma-Navwalker. It almost worked for me but I ran into problems with functions that use the walker_nav_menu_start_el filter and depend on $args being a stdClass object. YMMV.
• I just found saffa803/sage-bulma-navwalker/blob/master/bulma-navwalker.php. Sigh. It uses <li>s which need some extra CSS to be presented in a row (that is, a navbar).