JS implements real-time feedback of the current time function-JS Tutorial-php.cn

JS implements real-time feedback of the current time function

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Release： 2018-04-16 16:57:33

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This time I will bring you JS to realize the real-time feedback of the current time function. What are the precautions for JS to realize the real-time feedback of the current time function? The following is a practical case, let’s take a look.

Use

javascriptFeedback system time

Apply knowledge

JavaScript HTML DOM

The setInterval() method in HTML DOM will continue to call the

function until clearInterval() is called or the window is closed. The ID value returned by setInterval() can be used as an argument to the clearInterval() method.

Syntax

setInterval(code,milliseconds)

code——code (can be a function)

milliseconds - the time (in milliseconds) of this call

Therefore, we want to make the feedback system time move. We only need to call the method every 1000 milliseconds to make the displayed time move like an alarm clock.

setInterval(function(){myTimer()},1000)

new Date()//获得当前时间
.toLocaleTimeString()//根据本地时间把Date对象的时间部分转换为字符串
.getElementById("clock")//返回带有指定 ID 的元素
.innerHTML=c; //将c返回给指定元素

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Code part

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
</head>
<body>
  <p id="clock"></p>
</body>
<script>
  var a = setInterval(function(){myTimer()},1000);
  function myTimer(){
    var b = new Date();
    var c = b.toLocaleTimeString();
    document.getElementById("clock").innerHTML=c;
  }
</script>
</html>

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I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!