Cara buat Draggable Chatbox

Assalamu'alaikum wr wb,
Kali ini saya akan share bagaimana cara buat chatbox bisa di drag / Cara buat Draggable Chatbox.
Berikut ini syntaxnya.
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<style type="text/css">
body {
  background: #e9e9e9;
  font-family: 'Roboto', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
.chat {
  background: #ffffff;
  width: 300px;
  margin: 0 auto;
}
.chat header {
  background: #33c0d4;
  padding: 10px 15px;
  color: #ffffff;
  font-size: 14px;
  cursor: move;
}
.chat header:before,
.chat header:after {
  display: block;
  content: '';
  clear: both;
}
.chat header h2,
.chat .body ul li .content h3 {
  margin: 0;
  padding: 0;
  font-size: 14px;
  float: left;
}
.chat header h2 a {
  color: #ffffff;
  text-decoration: none;
}
.chat header .tools {
  list-style: none;
  margin: 0;
  padding: 0;
  float: right;
}
.chat header .tools li {
  display: inline-block;
  margin-right: 6px;
}
.chat header .tools li:last-child {
  margin: 0;
}
.chat header .tools li a {
  color: #ffffff;
  text-decoration: none;
  -webkit-transition: all 0.3s linear 0s;
  -moz-transition: all 0.3s linear 0s;
  -ms-transition: all 0.3s linear 0s;
  -o-transition: all 0.3s linear 0s;
  transition: all 0.3s linear 0s;
}
.chat .body {
  position: relative;
  max-height: 360px;
  overflow-y: scroll;
}
.chat .body .search {
  display: none;
  width: 100%;
}
.chat .body .search.opened {
  display: block;
}
.chat .body .search input {
  width: 100%;
  margin: 0;
  padding: 10px 15px;
  border: none;
  -webkti-box-size: border-box;
  -moz-box-size: border-box;
  box-size: border-box;
}
.chat .body ul {
  list-style: none;
  padding: 0;
  margin: 0;
  border-top: 1px solid #f2f2f2;
}
.chat .body ul li {
  position: relative;
  background: #ffffff;
  display: block;
  width: 100%;
  padding: 10px;
  box-sizing: border-box;
}
.chat .body ul li:before,
.chat .body ul li:after {
  display: block;
  content: '';
  clear: both;
}
.chat .body ul li:hover .thumbnail {
  background: #33c0d4;
}
.chat .body ul li:nth-child(2n) {
  background: #f2f2f2;
}
.chat .body ul li .thumbnail {
  display: inline-block;
  background: #bfbfbf;
  width: 50px;
  color: #ffffff;
  line-height: 50px;
  text-align: center;
  text-decoration: none;
  -webkit-transition: background 0.3s linear 0s;
  -moz-transition: background 0.3s linear 0s;
  -ms-transition: background 0.3s linear 0s;
  -o-transition: background 0.3s linear 0s;
  transition: background 0.3s linear 0s;
}
.chat .body ul li .thumbnail img {
  width: 100%;
}
.chat .body ul li .content {
  display: inline-block;
  margin-left: 6px;
  vertical-align: top;
  line-height: 1;
}
.chat .body ul li .content h3 {
  display: block;
  width: 100%;
  margin-bottom: 5px;
  color: #808080;
}
.chat .body ul li .content .preview {
  display: block;
  width: 100%;
  max-width: 200px;
  margin-bottom: 5px;
  color: #cccccc;
  font-size: 12px;
}
.chat .body ul li .content .meta {
  color: #b3b3b3;
  font-size: 12px;
}
.chat .body ul li .content .meta a {
  color: #999999;
  text-decoration: none;
}
.chat .body ul li .content .meta a:hover {
  text-decoration: underline;
}
.chat .body ul li .message {
  display: none;
  position: absolute;
  top: 0;
  left: 0;
  overflow: hidden;
  height: 100%;
  width: 100%;
  padding: 10px;
  box-sizing: border-box;
}
.chat footer a {
  background: #33c0d4;
  display: block;
  width: 100%;
  padding: 10px 15px;
  color: #ffffff;
  font-size: 14px;
  text-align: center;
  text-decoration: none;
  box-sizing: border-box;
}
.chat footer a:hover {
  background: skyblue;
  -webkit-transition: background 0.3s linear 0s;
  -moz-transition: background 0.3s linear 0s;
  -ms-transition: background 0.3s linear 0s;
  -o-transition: background 0.3s linear 0s;
  transition: background 0.3s linear 0s;
}
.info {
  width: 300px;
  margin: 25px auto;
  text-align: center;
}
.info h1 {
  margin: 0;
  padding: 0;
  font-size: 24px;
  font-weight: 400;
  color: #333333;
}
.info span {
  color: #666666;
  font-size: 12px;
}
.info span a {
  color: #000000;
  text-decoration: none;
}
.info span .fa {
  color: #33c0d4;
}
.info span .spoilers {
  color: #999999;
  margin-top: 5px;
  font-size: 10px;
}
</style>

 <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css">

<div class='info'>
  <h1>Draggable Chatbox</h1>
  <span>
    Made with
    <i class='fa fa-heart animated infinite pulse'></i>
    by
    <a href='http://andytran.me'>Andy Tran</a>
    <br>
    Modify by Syawaluddin Amin, S.Kom
    <div class='spoilers'>
   
 
      (Click the search button) | (Scroll the chat)
    </div>
  </span>
</div>
<div class='chat'>
  <header>
    <h2 class='title'>
      <a href='http://www.elegantthemes.com/'>ElegantThemes</a>
    </h2>
    <ul class='tools'>
      <li>
        <a class='fa fa-gear' href='#'></a>
      </li>
      <li>
        <a class='fa fa-search' href='#'></a>
      </li>
    </ul>
  </header>
  <div class='body'>
    <div class='search'>
      <input placeholder='Search...' type='text'>
    </div>
    <ul>
      <li>
        <a class='thumbnail' href='#'>
          NR
        </a>
        <div class='content'>
          <h3>Nick Roach</h3>
          <span class='preview'>hey how are things going on the...</span>
          <span class='meta'>
            2h ago &middot;
            <a href='#'>Category</a>
            &middot;
            <a href='#'>Reply</a>
          </span>
        </div>
      </li>
      <li>
        <a class='thumbnail' href='#'>
          KS
        </a>
        <div class='content'>
          <h3>Kenny Sing</h3>
          <span class='preview'>make sure you take a look at the...</span>
          <span class='meta'>
            3h ago &middot;
            <a href='#'>Category</a>
            &middot;
            <a href='#'>Reply</a>
          </span>
        </div>
      </li>
      <li>
        <a class='thumbnail' href='#'>
          MS
        </a>
        <div class='content'>
          <h3>Mitch Skolnik</h3>
          <span class='preview'>i love wood grain things!</span>
          <span class='meta'>
            6h ago &middot;
            <a href='#'>Category</a>
            &middot;
            <a href='#'>Reply</a>
          </span>
        </div>
      </li>
      <li>
        <a class='thumbnail' href='#'>
          YP
        </a>
        <div class='content'>
          <h3>Yuriy Portnykh</h3>
          <span class='preview'>check issues for the latest version...</span>
          <span class='meta'>
            10h ago &middot;
            <a href='#'>Category</a>
            &middot;
            <a href='#'>Reply</a>
          </span>
        </div>
      </li>
      <li>
        <a class='thumbnail' href='#'>
          JR
        </a>
        <div class='content'>
          <h3>Josh Ronk</h3>
          <span class='preview'>make sure to do the following by...</span>
          <span class='meta'>
            2d ago &middot;
            <a href='#'>Category</a>
            &middot;
            <a href='#'>Reply</a>
          </span>
        </div>
      </li>
      <li>
        <a class='thumbnail' href='#'>
          BM
        </a>
        <div class='content'>
          <h3>Benjamin Mueller</h3>
          <span class='preview'>Hi nice to meet you!</span>
          <span class='meta'>
            1w ago &middot;
            <a href='#'>Category</a>
            &middot;
            <a href='#'>Reply</a>
          </span>
        </div>
      </li>
    </ul>
  </div>
  <footer>
    <a href='#'>View All Messages</a>
  </footer>
</div>

  <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>


<script src="https://code.jquery.com/ui/1.11.2/jquery-ui.min.js"></script>

<script type="text/javascript">
  $('.fa-search').click(function(){
   $(this).stop().toggleClass('fa-close');
   $('.search').stop().animate({height: "toggle", opacity: "toggle"}, 300);
  });

   $('.chat').draggable({ handle: 'header' });
</script>
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Semoga bermanfaat.
http://pangeran-it.blogspot.co.id/