For help on the event object!

  node.js, question
$(function(){
 document.onclick = javscriptHandle;
 
 $(document).on('click', jqueryHandle);
 
 function javscriptHandle(event){
 Log ('javascript:' plus event');
 bracket
 
 function jqueryHandle(event){
 Log ('jquery:' plus event');
 bracket
 
 });

It means that the event in jquery event handler has been processed by jquery, can it be cross-browser?

Yes,jQueryForeventObject handles browser differences
You can refer to
Official Englishhttps://api.jquery.com/category/events/event-object/
Chinese versionhttp://www.css88.com/jqapi-1.9/category/events/event-object/