make the first tab the active tab when open a bootstrap modal

Question

i have a button that will show a bootstrap modal when clicks on it the modal contains sidebar tabs.

my problem is when i close the modal and open it again by clicking on the button it will open with the last activated tab i want the activated tab to be the first tab once i close the modal and open the modal again without reloading the page.

my html

 // the button that will open the bootstrap modal  
            <div>
            <a href="#"  class="popupLink" data-toggle="modal" data-target="#yDetailsModal"> 
            </a>
            </div>

// bootstrap modal  


<div class="modal" id="MyDetailsModal" tabindex="-1" role="dialog" arialabelledby="myDetailsModal" aria-hidden="true" >

 <div class="modal-dialog modal-details" role="document">

  <div class="modal-content modal-details">

   <div class="modal-header">

 <button type="button" class="close close-button"  data-dismiss="modal" aria-label="Close" id="btnId"> </button>

  </div>


 <div class="modal-body">
  <div class=" tabs-left" id= "modal-tabs">
   <ul class="nav nav-tabs">

   <li class="active"> 
   <a href="#personal"  data-toggle="tab"></a></li>

  <li>
   <a  href="#promotion" data-toggle="tab"> </a> </li> 
    <li>
    <a  href="#vacation" data-toggle="tab"> </a> </li>


</ul>
 </div>



<div class="tab-content" id="tab-content">
 <div class="tab-pane active" id="personalInformation"> 
  <div>
   <ul>
     <li>

      <span> this is a personal information</span>
      </li>
</ul>
</div>
</div>

Answer 1

Just use the Bootstrap default methods modal and tab

$('#MyDetailsModal').on('show.bs.modal', function (event) { 
    $(this).find('.nav a:first').tab('show');
})

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>


<div>
    <a href="#" class="popupLink btn btn-info btn-lg" data-toggle="modal" data-target="#MyDetailsModal">MyDetailsModal
    </a>
</div>

<div class="modal" id="MyDetailsModal" tabindex="-1" role="dialog" arialabelledby="myDetailsModal" aria-hidden="true">
    <div class="modal-dialog modal-details" role="document">
        <div class="modal-content modal-details">
            <div class="modal-header">
                <button type="button" class="close close-button" data-dismiss="modal" aria-label="Close" id="btnId"> </button>
            </div>

            <div class="modal-body">
                <div class=" tabs-left" id="modal-tabs">
                    <ul class="nav nav-tabs">
                        <li class="active">
                            <a href="#personal" data-toggle="tab">personal</a>
                        </li>
                        <li>
                            <a href="#promotion" data-toggle="tab">promotion</a>
                        </li>
                        <li>
                            <a href="#vacation" data-toggle="tab">vacation</a>
                        </li>
                    </ul>
                </div>

                <div class="tab-content" id="tab-content">
                    <div class="tab-pane active" id="personal">
                        this is a personal information
                    </div>
                    <div class="tab-pane" id="promotion">
                        this is a promotion information
                    </div>
                    <div class="tab-pane" id="vacation">
                        this is a vacation information
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>