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<!DOCTYPE html> <html> <head> <script src="/lib/jquery-1.12.2.min.js"></script> <script> $(document).ready(function(){ $("button").click(function(){ var div = $("div"); startAnimation(); showQueue(); function startAnimation(){ div.animate({height: 300}, "slow"); div.animate({width: 300}, "slow"); div.animate({height: 100}, "slow"); div.animate({width: 100}, "slow",startAnimation); } function showQueue(){ var q = div.queue(); $("span").text(q.length); setTimeout(showQueue); } }); }); </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>