javascript(set Timeoutでset Intervalではなく)

 
  
var num = 0; 
  
var max = 10; 
  
function incrementNumber() { 
  
num++; 
  
//if the max has not been reached, set another timeout 
  
if (num < max) { 
  
setTimeout(incrementNumber, 500); 
  
} else { 
  
alert(“Done”); 
  
} 
  
} 
  
setTimeout(incrementNumber, 500); 
  
 
 

setIntervalを使うと次回の呼び出しがあるかもしれません.前回の呼び出し前に呼び出します.
True interval s are rarely used in production environments because it's possible that one interval begin before the previous one has finished executing)