This article mainly introduces the relevant information on realizing real-time feedback system time in pure JavaScript. Friends who need it can refer to it and hope it can help everyone.
Feedback system time using javascript
Use knowledge
JavaScript HTML DOM
The setInterval() method in HTML DOM will continuously 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.
SyntaxsetInterval(code,milliseconds)
code——code (can be a function)
milliseconds——the time of this call (milliseconds) )
Therefore, we want the feedback system time to move. We only need to make the method call 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<!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>Pure JavaScript to implement real-time feedback system time
JavaScript real-time feedback system time implementation method sharing、
Use js to display the current system time
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