v2.0.0

[data-toggle="dropdown"] is required for [data-submenu].
.dropdown-submenu > [data-toggle="dropdown"] is forbidden.

Example HTML:

<div class="dropdown">
  <button class="btn btn-default dropdown-toggle" type="button" data-toggle="dropdown" data-submenu>Dropdown</button>

  <ul class="dropdown-menu">
    <li><a tabindex="0">Action</a></li>
    <li class="dropdown-submenu">
      <a tabindex="0">Another action</a>

      <ul class="dropdown-menu">
        <li class="dropdown-header">Dropdown header</li>
        <li><a tabindex="0">Sub action</a></li>
        <li class="disabled"><a tabindex="0">Another sub action</a></li>
        <li><a tabindex="0">Something else here</a></li>
      </ul>
    </li>
    <li><a tabindex="0">Something else here</a></li>
    <li class="divider"></li>
    <li><a tabindex="0">Separated link</a></li>
  </ul>
</div>

Example js:

$('[data-submenu]').submenupicker();