<html><head><script src="https://libs.baidu.com/jquery/2.1.4/jquery.min.js"></script><script>$(document).ready(function(){ $("body").on("click", "button", function(event){ alert("delegateTarget returns: " + event.delegateTarget.nodeName + "\ncurrentTarget returns: " + event.currentTarget.nodeName); });});</script></head><body><button>Show the difference between delegateTarget and currentTarget when delegation occurs</button></body></html>