<!-- // SlideOut -->
<div id="slideOut">
<!--   // Tab -->
  <div class="slideOutTab">
    <div>
      <p>i am tab.</p>
    </div>
  </div>
  <div class="modal-content">
    <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
      <h4 class="modal-title">Hello World!</h4> </div>
    <div class="modal-body">
      <p>One fine body…</p>
    </div>
    <div class="modal-footer"> </div>
  </div>
</div>
<!-- // Scroll content -->
<section>
  <div class="intro text-center"><h1>Slide out Panel & Tab</h1><h4>{ Built with Bootstrap + Modal }</h4></div>
</section>
<section></section>
<section></section>
#slideOut {
  position: fixed;
  width: 300px;
  height: 800px;
  top: 30px;
  right: -300px;
  /* Animation  */
  transition-property: all;
  transition-duration: .5s;
  transition-timing-function: cubic-bezier(0, 1, 0.5, 1);
}


/* Display slideOut */

.showSlideOut {
  right: 0px !important;
}


/* Tab */

.slideOutTab {
  margin-top: 50px;
  position: absolute;
  left: -40px;
  height: 200px;
  width: 40px;
  -webkit-box-shadow: 0 5px 15px rgba(0, 0, 0, .5);
  box-shadow: 0 5px 15px rgba(0, 0, 0, .5);
  background: #F2AB34;
  border-radius: 15px 0px 0px 15px
}

.slideOutTab div {
  text-align: center;
  position: relative;
  right: 70px;
  top: 90px;
  background: #F2AB34;
  width: 180px;
  -webkit-transform: rotate(270deg);
  -moz-transform: rotate(270deg);
  -o-transform: rotate(270deg);
  writing-mode: lr-tb;
}


/* None relevant included styling */

body,
html {
  background: #4DA6BB;
  overflow: visible;
  height: 100%;
  width: 100%;
}

h1 {font-size:70px;margin-top:-90px}

section:nth-child(2) {
  background: #7876A0;
}

section {
  height: 100%;
  width: 100%;
}

.modal-body {
  height: 400px;
}

section {
    display: table;
    width: 100%;
    height: 100%;
}
 .intro {
        display: table-cell;
        vertical-align: middle;
 
      }
this.$slideOut = $('#slideOut');

// Slideout show
this.$slideOut.find('.slideOutTab').on('click', function() {
  $("#slideOut").toggleClass('showSlideOut');
});

External CSS

  1. https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/2.2.2/jquery.min.js
  2. https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js