jquery和CSS3有彈性動畫效果的工具列選單

<link rel="stylesheet" href="css/font-awesome.min.css">
<script src="path/to/jquery.min.js"></script>

<div id="wrapper">
  <div id="toolbar">
        <div class="button"></div>
        <ul class="icons">
              <li><i class="fa fa-home fa-2x" aria-hidden="true"></i></li>
              <li><i class="fa fa-user fa-2x" aria-hidden="true"></i></li>
              <li><i class="fa fa-star fa-2x" aria-hidden="true"></i></li>
              <li><i class="fa fa-file-text-o fa-2x" aria-hidden="true"></i></li>
              <li><i class="fa fa-paper-plane-o fa-2x" aria-hidden="true"></i></li>
        </ul>
      </div>
</div>

#wrapper {
  text-align:center;
  font-family: 'Lato', sans-serif;
  text-transform:uppercase;
}
#toolbar {  
  width:100%;
  max-width:670px;
  min-width:550px;
  margin: 70px auto;
}
.button {
  width:70px;
  height:70px;
  border-radius:50%;
  background-color:#3AB09E;
  color:#ffffff;
  text-align:center;
  font-size:3.5em;
  position:relative;
  left:50%;
  margin-left:-35px;
  z-index:1;
}
.button,.icons{
  -webkit-transition: -webkit-all 1s cubic-bezier(.87,-.41,.19,1.44);
          transition:  all 1s cubic-bezier(.87,-.41,.19,1.44);
}
.button:after {
  content:"+";
}
.button.active {
-webkit-transform: rotate(45deg);
 transform: rotate(45deg);
  left:60px;
}
.icons {
  width:0%;
  overflow:hidden;
  height:36px;
  list-style:none;
  padding:16px 10px 10px 50px;
  background-color:#ffffff;
  box-shadow: 1px 1px 1px 1px #DCDCDC;
  margin:-68px 0 0 45%;
  border-radius: 2em;
}
 
.icons.open {
  width:80%;
  margin:-68px 0 0 5%;
  overflow:hidden;
}
 
.icons li {
  display: none;
  width:10%;
  color:#3AB09E;
}
 
.icons.open li {
  width:16%;
  display: inline-block;
}

$( ".button" ).click(function() {
  $(this).toggleClass( "active" );
  $(".icons").toggleClass( "open" );
});