vue3 + element 实现季度选择框

<template>
  <div class="el-quarter-wrap">
    <el-popover title="" content="" width="320" v-model="visible">
      <template #reference>
        <el-input v-model="quarterDate" placeholder="请选择季度" clearable :prefix-icon="Calendar" readonly
          @click.stop.native="visible = true" @change="quarterDateChange">
          <template #suffix>
            <el-icon v-if="quarterDate" class="el-quarter-clear" @click="clearData">
              <Close />
            </el-icon>
          </template>
        </el-input>
      </template>

      <div class="el-quarter__header">
        <span class="el-quarter-btn el-quarter-btn__pre" @click="changeShowYear(-1)">
          <el-icon>
            <DArrowLeft />
          </el-icon>
        </span>
        <div class="el-quarter__header-text" @click="showYearList">
          {{ quarterTitle }}
        </div>

        <span class="el-quarter-btn el-quarter-btn__next" @click="changeShowYear(1)">
          <el-icon>
            <DArrowRight />
          </el-icon>
        </span>
      </div>

      <div class="el-quarter__content" v-if="!isEditYear">
        <div class="el-quarter__row">
          <span class="quarter-index" :class="{ 'is-active': showYear === pickerYear && quarterIndex === 1 }"
            @click="pickerQuarte(1)">第一季度</span>
          <span class="quarter-index" :class="{ 'is-active': showYear === pickerYear && quarterIndex === 2 }"
            @click="pickerQuarte(2)">第二季度</span>
        </div>
        <div class="el-quarter__row">
          <span class="quarter-index" :class="{ 'is-active': showYear === pickerYear && quarterIndex === 3 }"
            @click="pickerQuarte(3)">第三季度</span>
          <span class="quarter-index" :class="{ 'is-active': showYear === pickerYear && quarterIndex === 4 }"
            @click="pickerQuarte(4)">第四季度</span>
        </div>
      </div>

      <div class="el-year__content" v-else>
        <div class="el-year-item" v-for="item in yearList">
          <div class="cell" :class="{ 'is-active': showYear == item }" @click="selectYear(item)">
            {{ item }}
          </div>
        </div>
      </div>

    </el-popover>
  </div>
</template>

<script lang="ts" setup>
import { DArrowLeft, DArrowRight, Close, Calendar } from '@element-plus/icons-vue'

import { computed, onMounted, reactive, ref } from 'vue'
let visible = ref(false)

const props = defineProps({
  modelValue:{
    type: String,
    default: ''
  }
})

const emits = defineEmits(['update:modelValue', 'change'])

// 绑定日期
let quarterDate = ref('')
// 选择的年
let pickerYear = ref('') as any
// 展示的年
let showYear = ref('') as any
// 选择的季度
let quarterIndex = ref(0)

// 是否展示年份列表
let isEditYear = ref(false)

// 年份列表开始年份
let startYear = ref('') as any

// 年份列表
let yearList = reactive([] as any)

const quarterTitle = computed(() => {
  if(isEditYear.value) {
    return startYear.value+ "年 - " + (startYear.value + 9) + "年"
  } else {
    return showYear.value + '年'
  }
})

// 选择某季度
function pickerQuarte(index:number) {
  quarterIndex.value = index
  pickerYear.value = showYear.value

  let oldValue =  quarterDate.value // 记录上一次数据
  quarterDate.value = pickerYear.value + "-Q" + index
  emits('update:modelValue', quarterDate.value)
  // 新老数据不一致，触发change时间
  if(oldValue !== quarterDate.value) {
    emits('change', quarterDate.value)
  }
}

// 更改展示的年
function changeShowYear(num: number) {
  if(isEditYear.value) {
    startYear.value = startYear.value + (num * 10)
    // console.log('startYear.value', startYear.value)
    changeYearList()
  } else {
    showYear.value = showYear.value + num
  }
}

// 清空选择的数据
function clearData() {
  quarterDate.value = ''
  pickerYear.value = ''
  showYear.value = new Date().getFullYear()
  quarterIndex.value = 0
}

// 选择的数据
function quarterDateChange(value:any) {
  const splitArray = value.split('-Q')
  if (splitArray.length < 2) {
    pickerYear.value = ''
    showYear.value = new Date().getFullYear()
    quarterIndex.value = 0
  } else {
    pickerYear.value = splitArray[0]
    showYear.value = splitArray[0]
    quarterIndex.value = splitArray[1]
  }
}

// 更改年份列表函数
function changeYearList() {
  yearList = []
  let year = startYear.value
  for (let i = 0; i < 10; i++) {
    yearList.push(year++)
  }
}

// 切换展示年份列表 和 季度
function showYearList() {
  if(!isEditYear.value) {
    startYear.value = Number(Math.floor(showYear.value / 10) + '0')
    changeYearList()
    isEditYear.value = true
  } else {
    isEditYear.value = false
  }
 
}

// 选中某个年份列表
function selectYear(item:any) {
  showYear.value = item
  isEditYear.value = false
}

onMounted(() => {
  // 初始化展示的年为当前年份
  showYear.value = new Date().getFullYear()
  startYear.value = Number(Math.floor(showYear.value / 10) + '0')
  changeYearList()

})
</script>

<style lang="less">
.el-quarter__header {
  padding-bottom: 12px;
  border-bottom: 1px solid #ebeef5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  .el-quarter-btn {
    font-size: 12px;
  }
  .el-quarter__header-text {
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
  }
}
.el-quarter__content {
  min-height: 100px;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  .el-quarter__row {
    display: flex;
    justify-content: space-around;

    .quarter-index {
      display: flex;
      padding: 4px 10px;
      width: fit-content;
      cursor: pointer;

      &:hover {
        color: #337ecc
      }
    }

    .is-active {
      color: #409eff
    }
  }
}
.el-quarter-clear {
  position: relative;
  color: #909399;
  display: none;
  height: 12px;
  width: 12px;
  cursor: pointer;

  &::after {
    content: '';
    position: absolute;
    height: 14px;
    width: 14px;
    margin: auto;
    border-radius: 50%;
    border: 1px solid #909399
  }
}
.el-input {
  &:hover {
    .el-quarter-clear {
      display: flex;
    }
  }
}
.el-year__content {
  min-height: 100px;
  display: flex;
  padding: 10px 0;
  flex-wrap: wrap;
  .el-year-item {
    width: calc(100% / 4);
    display: flex;
    align-items: center;
    justify-content: center;
    .cell {
      padding: 4px 10px;
      width: fit-content;
      cursor: pointer;
      cursor: pointer;
      white-space: nowrap;
      &:hover {
        color: #337ecc
      }
    }
    .is-active {
      color: #409eff
    }
  }
}</style>

<ElQuarter style="width: 320px;" v-model="quarteDate" @change="quarterChange" />