1.時間戳轉換為XXXX-XX-XX  HH:MM:SS

    timeFunc(value) {//value為時間戳
        let time = new Date(parseInt(value) * 1000);
        function add0(m) {
            return m < 10 ? '0' + m : m
        }
        let y = time.getFullYear();
        let m = time.getMonth() + 1;
        let d = time.getDate();
        let h = time.getHours();
        let wek = time.getDay();
        let mi = time.getMinutes();
        let s = time.getSeconds();
        let t = y + '-' + add0(m) + '-' + add0(d) + ' ' + add0(h) + ':' + add0(mi) + ':' + add0(s)
        //let t= y + '-' + add0(m) + '-' + add0(d) +"-"+wek
        //console.log("轉換成功之後的時間:",t)
        return t;

    },

2.時間轉換為時間戳

timeFunc(value){//value= 2018-04-04

   let  str = d.replace(/-/g,'/'); 
         let date = new Date(str);

        return     date.getTime()/1000

}

3.獲取時間段範圍(例如:7天內)

console.log(timeFunc(0),timeFunc(6))//代表七天

timeFunc(n){//n為距離現在幾天,0代表今天,1代表昨天

      var n = n;
        var d = new Date();
        var year = d.getFullYear();
        var mon = d.getMonth() + 1;
        var day = d.getDate();
        if(day <= n) {
            if(mon > 1) {
                mon = mon - 1;
            } else {
                year = year - 1;
                mon = 12;
            }
        }
        d.setDate(d.getDate() - n);
        year = d.getFullYear();
        mon = d.getMonth() + 1;
        day = d.getDate();
       let   s = year + "-" + (mon < 10 ? ('0' + mon) : mon) + "-" + (day < 10 ? ('0' + day) : day);
       console.log(s)
       return s;

}