How to fix dispatchEvent for Google Chrome 53+

In new version of Google Chorme the command dispatchEvent not work well.



In my previous script I saved the file with the following code, but dispatchEvent not work and no file was saved.

        var today = new Date();                       
           downloadWithName("data:text/csv;charset=utf-8," + escape(myCsv), "sharePost_" + today.toUTCString() + ".dat");  
              
      }  
   
   function downloadWithName(uri, name) {  
   function eventFire(el, etype){           
     if (el.fireEvent) {  
       (el.fireEvent('on' + etype));  
     } else {  
       var evObj = document.createEvent('Events');  
       evObj.initEvent(etype, true, false);  
       el.dispatchEvent(evObj);  
     }  
   }  
   
   var link = document.createElement("a");;  
   link.download = name;  
   link.href = uri;    
   eventFire(link, "click");  

the solution is to change istruction createEvent with MouseEvent:

           downloadWithName("data:text/csv;charset=utf-8," + escape(myCsv), "sharePost_" + today.toUTCString() + ".dat");  
              
      }  
   
   function downloadWithName(uri, name) {  
   function eventFire(el, etype){           
     if (el.fireEvent) {  
       (el.fireEvent('on' + etype));  
     } else {  
       //var evObj = document.createEvent('Events');  
        var evObj = new MouseEvent(etype)  
       evObj.initEvent(etype, true, false);  
       el.dispatchEvent(evObj);  
     }  
   }  
   
   var link = document.createElement("a");;  
   link.download = name;  
   link.href = uri;    
   eventFire(link, "click");