AEM HTML Embed overflow

Inser HTML Snippets into AEM Component and Rendered it as Html Page component

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/jasny-bootstrap/3.1.1/css/jasny-bootstrap.css">
<script src="//cdnjs.cloudflare.com/ajax/libs/jasny-bootstrap/3.1.1/js/jasny-bootstrap.js"></script>
<!-- Button trigger modal -->
<button class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
  Launch Content Editor
</button>

<div class="container">
  <h2>Content Rendered</h2>
  <div class="panel panel-default">
    <div class="panel-body">
      <h2><i>A Basic AEM Component</i></h2>
      
    </div>
    
    <div class="panel-body123">
    </div>
    </div>
  </div>
</div>



<div id="myModal" class="modal fade">
    <div class="modal-dialog">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
                <h4 class="modal-title">Content Editor</h4>
            </div>
            <textarea class="modal-body" rows="4" cols="60">
               <h2><i>A Basic AEM Component</i></h2>
               
            </textarea>
            <div class="modal-footer">
                <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
                <button id="save"  type="button" data-dismiss="modal" class="btn btn-primary">Save changes</button>
            </div>
        </div>
        <!-- /.modal-content -->
    </div>
    <!-- /.modal-dialog -->
</div>
<!-- /.modal -->

CSS

.modal-body {
    max-height: calc(100vh - 210px);
    overflow-y: auto;
}

JavaScript

$("#save").click(function(){
console.log($(".modal-body").val());
	var decoded = Encoder.htmlDecode($(".modal-body").val());

   //$(".panel-body").html(decoded);
   
   $(".panel-body").html($(".modal-body").val());
   
   
});