javascript - jQuery Tree Up Traversal -

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simple question. i'm trying target 'i' tag panel-indicator class in tree. additionally need remove 'hide' class panel-edit 'i' tag. here's html: 

<div class="panel panel-default">      <div class="panel-heading" role="tab" id="headingone">            <i class="panel-indicator glyphicon glyphicon-chevron-down pull-right"></i>           <i class="panel-edit glyphicon glyphicon-pencil pull-right hide"></i>           <h4 class="panel-title" id="-collapsible-group-item-#1-">                <a data-toggle="collapse" data-parent="#collapseone" href="#collapseone" aria-expanded="false" aria-controls="collapseone" class="collapsed">system details</a>                <a class="anchorjs-link" href="#-collapsible-group-item-#1-"><span class="anchorjs-icon"></span></a>           </h4>      </div> </div>

here's script code. though works, seems sloppy way work. i'm wanting know how write correctly sets 'rotate' class 'i' tag panel-indicator class.

$('.panel-heading > h4.panel-title > a').click(function () { if (!$(this).hasclass("open")) {     $(this).addclass("open");    $(this).parent().prev('i.panel-indicator').addclass('rotate'); } else if (     $(this).hasclass("open")) {        $(this).removeclass('open');           $(this).parent().prev().prev('i.panel-indicator').removeclass('rotate');     } });

try '.closest' instead:

<!doctype html>  <html lang="en">  <head>    <meta charset="utf-8">    <title>closest demo</title>    <style>    li {      margin: 3px;      padding: 3px;      background: #eeeeee;    }    li.hilight {      background: yellow;    }    </style>    <script src="https://code.jquery.com/jquery-1.10.2.js"></script>  </head>  <body>     <ul>    <li><b>click me!</b></li>    <li>you can <b>click me!</b></li>  </ul>     <script>  $( document ).on( "click", function( event ) {    $( event.target ).closest( "li" ).toggleclass( "hilight" );  });  </script>     </body>  </html>

source: https://api.jquery.com/closest/

edit: in case:

$('.panel-heading > h4.panel-title > a').click(function () { if (!$(this).hasclass("open")) {     $(this).addclass("open");    $(this).closest('i.panel-indicator').addclass('rotate');  //edited line } else if (     $(this).hasclass("open")) {        $(this).removeclass('open');           $(this).closest('i.panel-indicator').removeclass('rotate');  // edited line     } });

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