function registerEvent(picker, index) {
    function setBackground(target) {
      target.css({ "background-color": "#FD4845", color: "#fff" });
      target
        .siblings("button")
        .css({ "background-color": "#FFF4F4", color: "#666" });
    }
    //点击某一个元素时手动添加第一次选中样式
    const dom = $(picker.$el).find(".el-picker-panel__shortcut")[index]; 
    setBackground($(dom));
    $(picker.$el)
      .find(".el-picker-panel__shortcut")
      .on("click", function() {
        setBackground($(this));
      });
  }
   
  export const dataTime = {
    today: {
      text: "今日",
      onClick(picker) {
        registerEvent(picker, 0); // 选中样式
        return picker.$emit("pick", [new Date(), new Date()]);
      }
    },
    yesterday: {
      text: "昨日",
      onClick(picker) {
        registerEvent(picker, 1);
        const date = new Date();
        date.setTime(date.getTime() - 3600 * 1000 * 24);
        return picker.$emit("pick", [date, date]);
      }
    },
    thisWeek: {
      text: "本周",
      onClick(picker) {
        let end = new Date();
        let week = end.getDay();
        //一天的毫秒数
        let millisecond = 1000 * 60 * 60 * 24;
        //减去的天数
        let minusDay = week != 0 ? week - 1 : 6;
        //本周 周一
        let monday = new Date(end.getTime() - minusDay * millisecond);
        const start = new Date(monday);
        start.setHours(0, 0, 0, 0);
        registerEvent(picker, 2);
        return picker.$emit("pick", [start, end]);
      }
    },
    lastWeek: {
      text: "上周",
      onClick(picker) {
        const starta = new Date();
        let first = starta.getDate() - starta.getDay() - 6;
        let startDate = new Date(starta.setDate(first));
        const start = new Date(startDate);
        start.setHours(0, 0, 0, 0);
        //  上周结束时间
        let currentDate = new Date();
        let firsts = currentDate.getDate() - currentDate.getDay() - 6;
        let last = firsts + 6;
        let endDate = new Date(currentDate.setDate(last));
        const end = new Date(endDate);
        end.setHours(23, 59, 59, 0);
        registerEvent(picker, 3);
        return picker.$emit("pick", [start, end]);
      }
    },
    thisMonth: {
      text: "本月",
      onClick(picker) {
        let currentDate = new Date();
        let currentMonth = currentDate.getMonth();
        //获得当前年份4位年
        let currentYear = currentDate.getFullYear();
        //求出本月第一天
        const start = new Date(currentYear, currentMonth, 1);
        const end = new Date();
        registerEvent(picker, 4);
        return picker.$emit("pick", [start, end]);
      }
    },
    lastMonth: {
      text: "上月",
      onClick(picker) {
        let that = this;
        //获取当前时间
        let currentDate = new Date();
        //获得当前月份0-11
        let currentMonth = currentDate.getMonth();
        //获得当前年份4位年
        let currentYear = currentDate.getFullYear();
        //获得上一个月的第一天
        if (currentMonth == 0) {
          currentMonth = 11; //月份为上年的最后月份
          currentYear--; //年份减1
          return new Date(currentYear, currentMonth, 1);
        } else {
          //否则,只减去月份
          currentMonth--;
        }
        const start = new Date(currentYear, currentMonth, 1);
        //获取当前时间
        let currentDates = new Date();
        //获得当前月份0-11
        let currentMonths = currentDates.getMonth();
        //获得当前年份4位年
        let currentYears = currentDates.getFullYear();
        //当为12月的时候年份需要加1
        //月份需要更新为0 也就是下一年的第一个月
        if (currentMonths == 11) {
          currentYears++;
          currentMonths = 0; //就为
        } else {
          //否则只是月份增加,以便求的下一月的第一天
          currentMonths++;
        }
        //一天的毫秒数
        let millisecond = 1000 * 60 * 60 * 24;
        //求出上月的最后一天
        let aa = new Date();
        let thisMonth = aa.getMonth();
        //获得当前年份4位年
        let thisYear = aa.getFullYear();
        //求出本月第一天
        let firstDay = new Date(thisYear, thisMonth, 1);
        let lastDay = new Date(firstDay.getTime() - millisecond);
        const end = new Date(lastDay);
        end.setHours(23, 59, 59, 0);
        registerEvent(picker, 5);
        return picker.$emit("pick", [start, end]);
      }
    },
    nearlyAMonth: {
      text: "近一个月",
      onClick(picker) {
        const end = new Date();
        const start = new Date();
        start.setTime(start.getTime() - 3600 * 1000 * 24 * 30);
        registerEvent(picker, 6);
        return picker.$emit("pick", [start, end]);
      }
    },
    nearlyThreeMonths: {
      text: "近三个月",
      onClick(picker) {
        const end = new Date();
        const start = new Date();
        start.setTime(start.getTime() - 3600 * 1000 * 24 * 90);
        registerEvent(picker, 7);
        return picker.$emit("pick", [start, end]);
      }
    },
    nearlySixMonths: {
      text: "近6个月",
      onClick(picker) {
        const end = new Date();
        const start = new Date();
        start.setTime(start.getTime() - 3600 * 1000 * 24 * 180);
        registerEvent(picker, 8);
        return picker.$emit("pick", [start, end]);
      }
    },
    withinThisYear: {
      text: "今年内",
      onClick(picker) {
        const end = new Date();
        const start = new Date();
        start.setTime(start.getTime() - 3600 * 1000 * 24 * 365);
        registerEvent(picker, 9);
        return picker.$emit("pick", [start, end]);
      }
    }
  };