Jeff-Russ · May 15, 2016 05:57
diff --git a/callbackhell.html b/callbackhell.html
 <!DOCTYPE html><html><head><script type="text/javascript">

 var i = 0;
 function print(message){ console.log(i+' '+message) }

 function main(callback){
  print('main')
  i++;
  if(i < 6) window.setTimeout( no_arg, 100);
  else      callback('I was passed to callback.');
 }
 function no_arg(){
  print('no_arg');
  main(has_arg);
 }
 function has_arg(arg){
  print('has_arg');
  print(arg);
 }

 main(has_arg);

 </script></head><body></body></html>


 <!-- returns:
 0 main
 1 no_arg
 1 main
 2 no_arg
 2 main
 3 no_arg
 3 main
 4 no_arg
 4 main
 5 no_arg
 5 main
 6 has_arg
 6 I was passed to callback.
 -->
	<!DOCTYPE html><html><head><script type="text/javascript">

	var i = 0;
	function print(message){ console.log(i+' '+message) }

	function main(callback){
	print('main')
	i++;
	if(i < 6) window.setTimeout( no_arg, 100);
	else callback('I was passed to callback.');
	}
	function no_arg(){
	print('no_arg');
	main(has_arg);
	}
	function has_arg(arg){
	print('has_arg');
	print(arg);
	}

	main(has_arg);

	</script></head><body></body></html>


	<!-- returns:
	0 main
	1 no_arg
	1 main
	2 no_arg
	2 main
	3 no_arg
	3 main
	4 no_arg
	4 main
	5 no_arg
	5 main
	6 has_arg
	6 I was passed to callback.
	-->