setTimeout 在我的 for 循环中不起作用 - 完全跳过它

Question

function whatever () {
  for (var i=0; i < arr.length; i++) {
     do something
    slowDown();
  };
};

 function slowDown () {
   time = setTimeout(function (){
       do something else
   }, 5000);
};

Answer 1

为什么不直接设置和间隔，对当前数组值执行直到完成，然后清除它？

let ctr = 0, time = setInterval(function() {
    let curitem = arr[ctr];
    // do somethign with curitem
    if (++ctr >= arr.length) clearInterval(time)
  }, 5000);

Answer 2

@vlaz 在问题的评论中指出的是正确的：

slowDown() will schedule something to execute later. It will not actually slow down anything. If you have a loop over 10 items, then you'd just have 10 tasks scheduled to execute 5 seconds later.

不确定这是否有帮助，但我认为这很相似

setTimeout 在我的 for 循环中不起作用 - 完全跳过它

setTimeout not working inside of my for loop - skipping it completely

javascript

for-loop

settimeout