动态时间函数生成 --> 直接调用

[猫在裙角.]

function fn(){
var time = new Date(); //获取到当前的时间 Thu Aug 20 2020 12:29:26 GMT+0800 (中国标准时间)
var str= "";
var div = document.getElementById("time"); //获取到头部head页面id是time的节点
// console.log(time);
var year = time.getFullYear(); //返回当前年份2020
var mon = time.getMonth()+1; //返回月份 0-11 +1就是返回当前的月份
var day = time.getDate(); //返回日份 1-31
var h = time.getHours(); //返回小时数 1-24
var m = time.getMinutes(); //返回分钟 1-60
var s = time.getSeconds(); //返回秒数 1-60
var week = time.getDay(); // 返回当前是星期几 0-6 0是星期天

switch (week){
case 0:week="日";
break;
case 1:week="一";
break;
case 2:week="二";
break;
case 3:week="三";
break;
case 4:week="四";
break;
case 5:week="五";
break;
case 6:week="六";
break;
}
str = year +"年"+totwo(mon)+"月"+totwo(day)+"日"+" "+totwo(h)+":"+totwo(m)+":"+totwo(s)+" "+"星期"+week;
div.innerHTML = str; //给该节点赋值 从而实现动态闹钟
}