jquery - Check If an element isn't visible on div -

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<div id="ris" class="alert alert-info">     <div id="one">         <p>.....</p>     </div>     <section id="toggle" class="toggle>         <label</label>          <div id="" class="toggle-content">             <ul>                 <li></li>                 <li></li>                 <li></li>                 <li></li>                 <li></li>                 <li></li>                 <li></li>             </ul>         </div>     </section> </div> 
if ($('section').css('display') == 'none') {     $("#one").show(); } else {     $("#one").hide(); }

selector :visible not work, tried css display, nothing. know if can make visible div #one when section not visible. in actual code there more sections.

this should help: $('section').is(':visible')

if ($('section').is(':visible')) {    $("#one").show();  } else {    $("#one").hide();  }
section {    display: block;    /* display: none; */  }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>  <div id="ris" class="alert alert-info">    <div id="one">      <p>.....</p>    </div>    <section id="toggle" class="toggle>    <label></label>     <div id=" "class="toggle-content ">    <ul>      <li>  </li>      <li>  </li>      <li>  </li>      <li>  </li>      <li>  </li>      <li>  </li>      <li>  </li>    </ul>  </div>  </section>  </div>


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