关于时间的函数

//获取昨天时间
getYesterday() {
      let day1 = new Date();
      day1.setTime(day1.getTime() - 24 * 60 * 60 * 1000);
      return day1.getFullYear() + '-' + (day1.getMonth() + 1) + '-' + day1.getDate();
    },
    getYesterdayStemp() {
      let day1 = new Date();
      return day1.setTime(day1.getTime() - 24 * 60 * 60 * 1000);
    },
    
    // 获取选定周时间
    getCurrentWeek(day) {
      let week = [];
      // 获取当前星期X(0-6,0代表星期天)
      let index = new Date(day).getDay();
      for (let i = 0; i < 7; i++) {
        let tmp = new Date(day);
        tmp.setDate(tmp.getDate() - index + i);
        week.push({ Date: tmp });
      }
      return week;
    },
    //获取选定月份最后一天（即选定月份的天数）
    getMonthMaxDay (year, month) {
      let newYear = year;
      let newMonth = month++
      if (month > 12) {
        newMonth -= 12; // 月份减
        newYear++; // 年份增
      }
      let newDate = new Date(newYear, newMonth, 1); // 取当年当月中的第一天
      return (new Date(newDate.getTime() - 1000 * 60 * 60 * 24)).getDate();// 获取当月最后一天日期
    },
    //获取系统当前时间
        var nowdate = new Date();
        var y = nowdate.getFullYear();
        var m = nowdate.getMonth()+1;
        var d = nowdate.getDate();
        var formatnowdate = y+'-'+m+'-'+d;
        $("#enddate").datebox("setValue",formatnowdate);
        //获取系统前一周的时间
        var oneweekdate = new Date(nowdate-7*24*3600*1000);
        var y = oneweekdate.getFullYear();
        var m = oneweekdate.getMonth()+1;
        var d = oneweekdate.getDate();
        var formatwdate = y+'-'+m+'-'+d;
        $("#fdate").datebox("setValue",formatwdate);
        //获取系统前一个月的时间
        nowdate.setMonth(nowdate.getMonth()-1);
        var y = nowdate.getFullYear();
        var m = nowdate.getMonth()+1;
        var d = nowdate.getDate();
        var formatwdate = y+'-'+m+'-'+d;
        $("#fdate").datebox("setValue",formatwdate);

根据以上函数对时间做处理

==html==
 <a-date-picker @change="onChange" v-if="this.key !== '1'"/>
 
==js==
onChange(date, dateString) {
      let nowDate = new Date()
      if (this.value == 'day') {
        if (date._d.getTime() < nowDate.getTime()) {
          this.endTime = dateString
          this.getChartData()
        } else {
          this.endTime = this.getYesterday()
          this.getChartData()
        }
      } else if (this.value == 'week') {
        let lastDay = this.getCurrentWeek(dateString)[6].Date.getTime()
        if (lastDay < this.getYesterdayStemp()) {
          this.endTime = moment(lastDay).format('YYYY-MM-DD')
          this.getChartData()
        } else {
          this.endTime = this.getYesterday()
          this.getChartData()
        }
      } else {
        let year = dateString.split('-')[0]
        let month = dateString.split('-')[1]
        let dayTotal = this.getMonthMaxDay(year, month)
        let lastDay = []
        lastDay = lastDay.concat(Number(year), Number(month), dayTotal).join('-')
        if (lastDay < this.getYesterday()) {
          this.endTime = lastDay
          this.getChartData()
        } else {
          this.endTime = this.getYesterday()
          this.getChartData()
        }
      }
    },