Accordions

Bootstrap 4
Bootstrap 3

Standard Accordions with Bootstrap 4

You can create accordions with very reduced code:

Markup

<div class="accordion" id="accordion">
 <accordion parent="accordion" heading="SECTION1" class="show">
   Lorem ipsum...
 </accordion>
 <accordion parent="accordion" heading="SECTION2">
   Lorem ipsum...
 </accordion>
</div>

Result

Lorem ipsum...

HTML

 <div id="accordion" class="panel-group">
   <div class="panel panel-default">
     <div class="panel-heading">
       <h4 class="panel-title">
         <a href="#accordion1" data-parent="#accordion" data-toggle="collapse">
           SECTION1
         </a>
       </h4>
     </div>
     <div class="panel-collapse collapse in" id="accordion1">
       <div class="panel-body">
         Lorem ipsum...
       </div>
     </div>
   </div>
   <div class="panel panel-default">
    <div class="panel-heading">
       <h4 class="panel-title">
         <a href="#accordion2" data-parent="#accordion" data-toggle="collapse">
           SECTION2
         </a>
       </h4>
     </div>
     <div class="panel-collapse collapse" id="accordion2">
       <div class="panel-body">
         Lorem ipsum...
       </div>
     </div>
   </div>
 </div>

Standard Accordions with Bootstrap 3

You can create accordions with very reduced code:

Markup

<div class="panel-group" id="accordion">
 <accordion parent="accordion" heading="SECTION1" class="in">
   Lorem ipsum...
 </accordion>
 <accordion parent="accordion" heading="SECTION2">
   Lorem ipsum...
 </accordion>
</div>

Result

Lorem ipsum...

HTML

 <div id="accordion" class="panel-group">
   <div class="panel panel-default">
     <div class="panel-heading">
       <h4 class="panel-title">
         <a href="#accordion1" data-parent="#accordion" data-toggle="collapse">
           SECTION1
         </a>
       </h4>
     </div>
     <div class="panel-collapse collapse in" id="accordion1">
       <div class="panel-body">
         Lorem ipsum...
       </div>
     </div>
   </div>
   <div class="panel panel-default">
    <div class="panel-heading">
       <h4 class="panel-title">
         <a href="#accordion2" data-parent="#accordion" data-toggle="collapse">
           SECTION2
         </a>
       </h4>
     </div>
     <div class="panel-collapse collapse" id="accordion2">
       <div class="panel-body">
         Lorem ipsum...
       </div>
     </div>
   </div>
 </div>