javascript - jQuery add a class to an element if there is another element on the page -

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i want hide div container when there no <h5> in it. div container hide. when server pulls feeds other website, <h5> add inside div container. div should show on page.

here simplify version of html structure without out <h5>

<div id="alert-feed">     <div class="webpart-title">title</div>     <div class="webpart-body">         <div class="contianer">             <ul class="feedlist">                 <li class="campusfeed">                     <ul class="articlelist"></ul>                 </li>             </ul>         </div>     </div> </div>

here html <h5>

<div id="alert-feed">     <div class="webpart-title">title</div>     <div class="webpart-body">         <div class="contianer">             <ul class="feedlist">                 <li class="campusfeed">                     <ul class="articlelist">                         <li>                             <a><h5 class="articletitle"></h5></a>                         </li>                     </ul>                 </li>             </ul>         </div>     </div> </div>

so want hide #alert-feed adding class no-alert when there no <h5> inside it. know done using hasclass , addclass, structure confusing me , can't it. me figure out how this?

try - needs run after have tried pull feeds website

var feed = $('#alert-feed');   // feed if (!feed.find('h5').length) { // check if doesn't contain h5   feed.addclass('no-alert');   // if doesn't, add class }

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