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Detailed explanation of JS timer function examples

怪我咯
Release: 2017-06-29 10:46:54
Original
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This article mainly introduces the relevant information of javascript timer in detail. It is very comprehensive and detailed. Friends in need can refer to

Timer

Basic format:

The code is as follows:

setInterval(function(){代码},1000);
/*
说明:1.setInterval 会返回一个计时器ID值
   可以这样接收。var setId = setInterval(....);
 2.接收setId的目的是为了清空计时器。
   clearTimeout(setId);
*/
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For example


One-time timer

Format:

The code is as follows:

   setTimeout(function(){代码},1000)
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Case:

The code is as follows:

        var setId = setTimeout(function(){
         alert('只执行一次');
        },1000);
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Title scrolling case

The code is as follows:

setInterval(function(){
     var tit =
document
.title;
    //1~length    +  0  
    document.title = tit.sub
string
(1)+tit.
substr
ing(0,1);
      },1000);
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