js字符串时间相减得出相减的天数

	console.log('时间',params.bg_date, params.end_date)
    function DateMinus(date1, date2) {
      //date1:小日期 date2:大日期
      var sdate = new Date(date1);
      var now = new Date(date2);
      var days = now.getTime() - sdate.getTime();
      var day = parseInt(days / (1000 * 60 * 60 * 24));
      return day;
    }
    let arg = DateMinus(params.bg_date, params.end_date);
		console.log(arg, "arg");