element-ui日期选择器-季度选择

<div class="H_P_title_choose width160" v-if="choseDateValue == '季'"> 
            <mark
              style="position:absolute;top:0;bottom:0;left:0;right:0;background:rgba(0,0,0,0);z-index:999;"
              v-show="showSeason"
              @click.stop="showSeason=true"
            ></mark>
            <el-input placeholder="请选择季度" v-model="showValue" style="138px;" @focus="showSeason=true">
              <i slot="prefix" class="el-input__icon el-icon-date"></i>
            </el-input>
            <el-card
              class="box-card"
              style="322px;padding: 0 3px 20px;margin-top:10px;position:fixed;z-index:9999"
              v-show="showSeason"
            >
              <div slot="header" class="clearfix" style="text-align:center;padding:0">
                <button
                  type="button"
                  aria-label="前一年"
                  class="el-picker-panel__icon-btn el-date-picker__prev-btn el-icon-d-arrow-left"
                  @click="prev"
                ></button>
                <span role="button" class="el-date-picker__header-label">{{year}}年</span>
                <button
                  type="button"
                  aria-label="后一年"
                  @click="next"
                  class="el-picker-panel__icon-btn el-date-picker__next-btn el-icon-d-arrow-right"
                ></button>
              </div>
              <div class="text item" style="text-align:center;">
                <el-button
                  type="text"
                  size="medium"
                  style="40%;color: #606266;float:left;"
                  @click="selectSeason(0)"
                >第一季度</el-button>
                <el-button
                  type="text"
                  size="medium"
                  style="float:right;40%;color: #606266;"
                  @click="selectSeason(1)"
                >第二季度</el-button>
              </div>
              <div class="text item" style="text-align:center;">
                <el-button
                  type="text"
                  size="medium"
                  style="40%;color: #606266;float:left;"
                  @click="selectSeason(2)"
                >第三季度</el-button>
                <el-button
                  type="text"
                  size="medium"
                  style="float:right;40%;color: #606266;"
                  @click="selectSeason(3)"
                >第四季度</el-button>
              </div>
            </el-card>
          </div>
        </div>

props: {
    valueArr: {
      default: () => {
        return ['01-03', '04-06', '07-09', '10-12']
      },
      type: Array
    },
    getValue: {
      default: () => {},
      type: Function
    },
    defaultValue: {
      default: '',
      type: String
    }
  }, 
data() {
    return {
      showSeason: false,
      season: '',
      year: new Date().getFullYear(),
      showValue: ''
    }
},
methods:{
    one() {
      this.showSeason = false
    },
    prev() {
      this.year = this.year * 1 - 1
    },
    next() {
      this.year = this.year * 1 + 1
    },
    selectSeason(i) {
      let that = this
      that.season = i + 1
      let arr = that.valueArr[i].split('-')
      that.getValue(that.year + arr[0] + '-' + that.year + arr[1])
      that.showSeason = false
      this.showValue = `${this.year}年${this.season}季度`
      if(this.season == 1){
        this.currLegendTime = moment().month(moment().month()).startOf('month').format('YYYY')
        this.currBegin = moment(new Date('2020-01')).startOf('month').format("YYYY-MM-DD")   //季度第一天
        this.currEnd = moment(new Date('2020-03')).startOf('month').format("YYYY-MM-DD")     //季度最后一天
        this.historyBegin = moment(new Date(this.year+'-1')).startOf('month').format("YYYY-MM-DD")  //历史第一天
        this.historyEnd = moment(new Date(this.year+'-3')).endOf('month').format("YYYY-MM-DD")  
      } 
    },
},
watch: {
    defaultValue: function(value, oldValue) {
      let arr = value.split('-')
      this.year = arr[0].slice(0, 4)
      let str = arr[0].slice(4, 6) + '-' + arr[1].slice(4, 6)
      let arrAll = this.valueArr
      this.showValue = `${this.year}年${arrAll.indexOf(str) + 1}季度`
    }
  },
created() {
    if (this.defaultValue) {
      let value = this.defaultValue
      let arr = value.split('-')
      this.year = arr[0].slice(0, 4)
      let str = arr[0].slice(4, 6) + '-' + arr[1].slice(4, 6)
      let arrAll = this.valueArr
      this.showValue = `${this.year}年${arrAll.indexOf(str) + 1}季度`
    }
  },