Tryit Editor v1.8

Source Code:

<!DOCTYPE html>
<html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js">
</script>
<script>
$(document).ready(function(){
  $("button").click(function(){
    var div = $("div");
    div.animate({height:300},"slow");
    div.animate({width:300},"slow");
    div.animate({height:100},"slow");
    div.animate({width:100},"slow");

    $("span").text(div.queue().length);   
  });
});
</script>
</head>
<body>
  
<button>Start Animation</button>
<p>The queue length is: <span></span></p>

<div style="width:50px;height:50px;position:absolute;left:10px;top:100px;background-color:red;"></div>

</body>
</html>

Result:

W3Schools.com - Try it yourself

Edit the code above and click "Submit Code" to see the result.