現在の時刻を取得し、指定日の前日、翌日、前日の日付、指定時間の前、後n分の日付を指定します.

module.exports = {
   formatTime: formatTime,
   getNextOrPreDate:getNextOrPreDate,
   getBeforeDate: getBeforeDate,
   getNowDate: getNowDate,
   getBeforeDay: getBeforeDay,
   getLastDay: getLastDay
}

function add0(m) {
   return m < 10 ? '0' + m : m
}
//      
function formatTime(shijianchuo) {
   //shijianchuo   ，   parseInt  
   var time = new Date(shijianchuo * 1000);
   var y = time.getFullYear();
   var m = time.getMonth() + 1;
   var d = time.getDate();
   var h = time.getHours();
   var mm = time.getMinutes();
   var s = time.getSeconds();
   return y + '-' + add0(m) + '-' + add0(d) + ' ' + add0(h) + ':' + add0(mm) + ':' + add0(s);
}
//      ，  YYYY-MM-DD
function getNowDate() {
   var date = new Date();
   var seperator1 = "-";
   var year = date.getFullYear();
   var month = date.getMonth() + 1;
   var strDate = date.getDate();
   if (month >= 1 && month <= 9) {
      month = '0'+month;
   }
   if (strDate >= 0 && strDate <= 9) {
      strDate = '0'+strDate;
   }
   var currentdate = year + seperator1 + month + seperator1 + strDate;
   return currentdate;
}
//         、     ,-1     ，1     
function getNextOrPreDate(date, day) {
   var dd = new Date(date);
   dd.setDate(dd.getDate() + day);
   var y = dd.getFullYear();
   var m = dd.getMonth() + 1 < 10 ? "0" + (dd.getMonth() + 1) : dd.getMonth() + 1;
   var d = dd.getDate() < 10 ? "0" + dd.getDate() : dd.getDate();
   return y + "-" + m + "-" + d;
}
//           
function getBeforeDay(d) {
   var d = new Date(d);
   console.log('d',d)
   d = +d - 1000 * 60 * 60 * 24;
   d = new Date(d);
   console.log('dddddd', d)
   var year = d.getFullYear();
   console.log(year)
   var mon = d.getMonth() + 1;
   console.log(mon)
   var day = d.getDate();
   console.log(day)
   var s = year + "-" + (mon < 10 ? ('0' + mon) : mon) + "-" + (day < 10 ? ('0' + day) : day);
   console.log(s)
   return s;

}
//         
function getLastDay(d) {
   d = new Date(d);
   d = +d + 1000 * 60 * 60 * 24;
   d = new Date(d);
   var year = d.getFullYear();
   var mon = d.getMonth() + 1;
   var day = d.getDate();
   var s = year + "-" + (mon < 10 ? ('0' + mon) : mon) + "-" + (day < 10 ? ('0' + day) : day);
   return s;
}
//      n     
function getBeforeDate(n) {
   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();
   var s = year + "-" + (mon < 10 ? ('0' + mon) : mon) + "-" + (day < 10 ? ('0' + day) : day);
   return s;
}

	//d      
	function getNowFormatDate(d) {
        var seperator1 = "-";
        var seperator2 = ":";
            //       
        var minutes=parseInt("30");  

        var interTimes=minutes*60*1000;

        var interTimes=parseInt(interTimes);  
        date=new Date(Date.parse(d)+interTimes);//+     -  
            
        var month = date.getMonth() + 1;
        var strDate = date.getDate();
        var hour = date.getHours();
        var minutes = date.getMinutes();
        var s=date.getSeconds();
        if (month >= 1 && month <= 9) {
            month = "0" + month;
        }
        if (strDate >= 0 && strDate <= 9) {
            strDate = "0" + strDate;
        }
        if (hour >= 0 && hour <= 9) {
            hour = "0" + hour;
        }
        if (minutes >= 0 && minutes <= 9) {
            minutes = "0" + minutes;
        }
        if (s >= 0 && s <= 9) {
            s = "0" + s;
        }

       var currentdate = date.getFullYear() + seperator1 + month + seperator1 + strDate
            + " " + hour + seperator2 + minutes
            + seperator2 + s;
        return currentdate;
     }
	var end_time =getNowFormatDate('2019-07-10 11:14:46');//2019-07-10 11:44:46

	function dateFormat(time) {
	    var date=new Date(time);
	    var year=date.getFullYear();
	    /*       ，    0   ，    0
	     *           10    0，           09:11:05
	     * */
	    var month= date.getMonth()+1<10 ? "0"+(date.getMonth()+1) : date.getMonth()+1;
	    var day=date.getDate()<10 ? "0"+date.getDate() : date.getDate();
	    var hours=date.getHours()<10 ? "0"+date.getHours() : date.getHours();
	    var minutes=date.getMinutes()<10 ? "0"+date.getMinutes() : date.getMinutes();
	    var seconds=date.getSeconds()<10 ? "0"+date.getSeconds() : date.getSeconds();
	    //   
	    return year+"-"+month+"-"+day+" "+hours+":"+minutes+":"+seconds;
	}
	console.log(dateFormat(Fri Jul 12 2019 00:00:00 GMT+0800))//"2019-07-12 00:00:00"