data() {
  return {
   pickerOptions2: {
    disabledDate: theDate => {
     const oneDay = 3600 * 1000 * 24

     const current = theDate.getTime()
     const now = Date.now()

     const condition1 = current > now
     if (!this.minDateTimestamp) return condition1

     const pickerRangeNum = 30

     // 時間范圍最大可選擇30天,最晚時間為今天
     const lastMonthBegin = this.minDateTimestamp
     const lastMonthEnd = lastMonthBegin + pickerRangeNum * oneDay

     return (
      condition1 || current < lastMonthBegin || current > lastMonthEnd
     )
    },
    onPick: ({ maxDate, minDate }) => {
     this.minDateTimestamp = minDate.getTime()
     if (maxDate) {
      this.minDateTimestamp = 0
     }
    },
   },
  }
 },

<template>
<el-date-picker
 class="form-item-control"
 v-model="qo2.dateRange2"
 type="daterange"
 range-separator=" 至 "
 start-placeholder="開始日期"
 end-placeholder="結束日期"
 placeholder="請選擇時間段"
 :picker-options="pickerOptions2"
/>
</template>