The example in this article introduces the corresponding code for javascript to dynamically obtain the login time and online duration. It is shared with everyone for your reference. The specific content is as follows
Rendering:
Implementation code:
<html>
<head>
<title>online</title>
<script language=javaScript>
///这里是获得登录时候的时间，用来和动态的时间做差来求时长
var s = new Date();
function clockon() {
var thistime = new Date();
//时间差
diff = new Date();
diff.setTime(Math.abs(thistime.getTime() - s.getTime()));
timediff = diff.getTime();
hos = Math.floor(timediff / (1000 * 60 * 60));
mins = Math.floor(timediff / (1000 * 60));
secs = Math.floor(timediff / 1000);
//end
var hours = thistime.getHours();
var minutes = thistime.getMinutes();
var seconds = thistime.getSeconds();
if (eval(hours) < 10) {
hours = "0" + hours;
}
if (eval(minutes) < 10) {
minutes = "0" + minutes;
}
if (seconds < 10) {
seconds = "0" + seconds;
}
thistime = hours + ":" + minutes + ":" + seconds;
bgclockshade.innerHTML = thistime//这里动态的嵌入当前的时间
//如果不取余的话，秒数是一直上升的，所以在达到一个60的时候就取余就可以解决这个问题了
if (secs > 59) {
secs = secs % 60;
}
if (mins > 59) {
mins = mins % 60;
}
if (eval(secs) < 10) {
secs = "0" + secs;
}
if (eval(mins) < 10) {
mins = "0" + mins;
}
if (eval(hos) < 10) {
hos = "0" + hos;
}
jishi.innerHTML = hos + ":" + mins + ":" + secs;
var timer = setTimeout("clockon()", 200);
}
</script>
</head>
<body onload="clockon();">
登录时间：
<div id="bgclockshade"></div>
上网时长：
<div id="jishi"></div>
</body>
</html>
The above is the entire content of this article, I hope it will be helpful to everyone’s study.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
