html - Bootstrap dropdown menu submenu not working -


my bootstrap menu doesn't show submenu dropdown. here's code. i'm using bootstrap 3. "dropdown-submenu" class believe should 1 show arrow , on click show submenu ul.

<div class="dropdown">   <button class="btn btn-default dropdown-toggle" type="button" id="dropdownmenu1" data-toggle="dropdown" aria-haspopup="true" aria-expanded="true">     category     <span class="caret"></span>   </button> <ul class="dropdown-menu">     <li class="dropdown-submenu">         <a href="/lifestyle/category/arts">arts</a>         <ul class="dropdown-menu">     <li >         <a href="/lifestyle/category/artist-profiles">artist profiles</a>    </li>        </ul>   </li>    <li >         <a href="/lifestyle/category/buzz-quiz">buzz quiz</a>     </li>    <li >         <a href="/lifestyle/category/coast">coast</a>    </li>    <li class="dropdown-submenu">         <a href="/lifestyle/category/crime-security">crime/security</a>        <ul class="dropdown-menu">    <li >         <a href="/lifestyle/category/rape-resources">rape resources</a>    </li>     <li >         <a href="/lifestyle/category/security-overview">security overview</a>   </li>        </ul>  </li>    <li >         <a href="/lifestyle/category/environment">environment</a>    </li>    <li class="dropdown-submenu">         <a href="/lifestyle/category/fashion">fashion</a>      <ul class="dropdown-menu">    <li >         <a href="/lifestyle/category/about-fafa">about fafa</a>    </li>    <li >       <a href="/lifestyle/category/designers">designers</a>    </li>         </ul>   </li>  </ul>  </div>

bootstrap 3.3.5 (current) documentation , bootstrap 3.3.5 css file not contain definition dropdown-submenu class. means class redundant , not affect code @ (of course, if haven't described in own css).
here js fiddle demo works how should work.

i have found definition of dropdown-submenu in bootstrap 2.3.2 looks depricated now.
here working js fiddle demo submenus bootstrap 2.3.2.

however, highly recommend not use outdated library because of single feature.


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