Element时间选择器之禁用今天以前的日期

        <el-date-picker
          v-model="form.timeRange"
          type="daterange"
          value-format="yyyy-MM-dd"
          range-separator="至"
          start-placeholder="开始日期"
          end-placeholder="结束日期"
          :disabled="readonly"
          :picker-options="pickerOptionsStart"
        />

   pickerOptionsStart: {
        disabledDate: (time) => {
          const now = new Date().setHours(0, 0, 0, 0)
          return time.getTime() < new Date(now).getTime()
        }
      }