js about time milliseconds wee hours a few days ago

Today morning=new Date(new Date().setHours(0, 0, 0, 0)) // Converted into year, month and day is today’s early morning

year, month, day, hour, minute, second

new Date().getFullYear()  //年
new Date().getMonth()+1  //月
new Date().getDate()  //日
new Date().getHours()  //时
new Date().getMinutes()  //分
new Date().getSeconds()  //秒

A few days ago

new Date(funydate(-6))  //6天前

```javascript
//毫秒的获取
let a = Date.now();
console.log(a);


let b = new Date().getTime()
console.log(b);

function funydate(num) { var date1 = new Date(); //Today's time var time1 = date1.getFullYear() +'-' + (date1.getMonth() + 1) +'-' + date1.getDate() ; console.log(time1); var date2 = new Date(date1); date2.setDate(date1.getDate() + num); //num is a positive number for the time after, num a negative number for the time before, 0 for today var time2 = date2.getFullYear() +'-' + (date2.getMonth() + 1) +'-' + date2.getDate(); console.log(time2); return time2; }

```javascript
 //时间转换
    function formatDateTime(date) {
      var y = date.getFullYear();
      var m = date.getMonth() + 1;
      m = m < 10 ? "0" + m : m;
      var d = date.getDate();
      d = d < 10 ? "0" + d : d;
      var h = date.getHours();
      h = h < 10 ? "0" + h : h;
      var minute = date.getMinutes();
      minute = minute < 10 ? "0" + minute : minute;
      var second = date.getSeconds();
      second = second < 10 ? "0" + second : second;
    //   return y + "-" + m + "-" + d;
      return y + "-" + m + "-" + d + " " + h + ":" + minute + ":" + second;
    },