dynamically created iframe triggers onload event twice

Question

I created an iframe dynamically and found that this iframe trigger onload event twice.

var i=0;
frameOnload=function(){
  console.log(i++);  
};

var ifr=doc         


        

Answer 1

I've had this happen to asynchronously loaded stylesheets, like this one.

I find that the simplest solution is to have the event remove itself: