setInterval-如何仅触发一次?

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问题描述

你好，我有这段代码片段，即使我选择了一段时间，它们也会触发一些代码.

Hello I have this snippet of code that will fire some even after time that I choose.

问题是，例如，如果我放3秒，它将每3秒触发一次，我需要的是3秒后仅触发一次.

The problem is that if, for example I put 3 seconds it will fire every 3 seconds, what I need is it to fire only once after 3 seconds.

function playSound(timeLeft){
   var sendDataTimeout = function(){
      alert('OK');
   }
   var intervalReference = 0;
   clearInterval(intervalReference);
   intervalReference = setInterval(sendDataTimeout, timeLeft);
}

推荐答案

改用setTimeout，它的工作原理几乎相同，但只会触发一次.您有clearTimeout和setTimeout，所以它与setInterval

Use setTimeout instead, it works almost the same but will only fire once. You have clearTimeout and setTimeout so its very similar to setInterval

function playSound(timeLeft){
   var sendDataTimeout = function(){
      alert('OK');
   }
   setTimeout(sendDataTimeout, timeLeft);
}

您不再需要使用clearTimeout.但仅供参考，它存在并且与clearInterval相同.

You don't have to use clearTimeout anymore. But FYI it exist and works the same as clearInterval.

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