在这里做个记录，感觉用得还挺多的
功能有如下：

• 切换月份按钮对应日历视图和中间日期都要变
• 选择日期日历视图要变
• 点击日历视图中的不属于当前选中月份的日期即可触发日历视图变化以及中间日期也要变

代码如下：

<template>
  <div class="calendar-test">
      <div class="calendar-test-content">
        <el-calendar
          ref="calendar"
          :model-value="selectedDate"
          @update:model-value="handleDateChange"
        >
          <template #header="{ date }">
            <div class="header-operate" style="width: 100%">

              <div class="calendar-title">
                <div class="calendar-buttom" @click="onArrowEvent('prev-month')">
                  <el-icon><ArrowLeft /></el-icon>
                </div>
                <div class="date-text">
                  <el-date-picker
                    v-model="calendarParam.selectedMonth"
                    type="month"
                    :placeholder="calendarParam.selectedMonth"
                    popper-class="month-picker"
                    format="YYYY-MM"
                    value-format="YYYY-MM"
                    :clearable="false"
                    @change="handleMonthChange"
                  />
                </div>
                <div class="calendar-buttom" @click="onArrowEvent('next-month')">
                  <el-icon><ArrowRight /></el-icon>
                </div>
              </div>
            </div>
          </template>
          <template #date-cell="{ data }">
            <div class="date-cell" style="height: 100%">
              <div class="day">{{ data.day.split("-").slice(2)[0] }}</div>
              <div class="day-content">
                <span class="day-title">这是内容</span>
              </div>
            </div>
          </template>
        </el-calendar>
      </div>
    </div>
</template>
<script setup>
import { reactive, ref, watch, onMounted, nextTick } from "vue";
import { useRouter, useRoute } from "vue-router";
import dayjs from "dayjs";
import { ArrowLeft,ArrowRight} from "@element-plus/icons-vue";

const router = useRouter();
const route = useRoute();

// 获取日历数据的查询参数
const calendarParam = reactive({
  selectedMonth: ref(dayjs().format("YYYY-MM")), // 设置默认值为当前月份
});

const calendarData = ref([]);
const getCalendarData = async () => {
  const result = await xxxxxrequest({ ...calendarParam });
  if (result.code == 200) {
    calendarData.value = result.data;
  }
};


const calendar = ref(null);
const selectedDate = ref(new Date()); // 初始日期

// 处理日期选择变化
const handleMonthChange = (val) => {
  if (!calendar.value) return;
  getCalendarData();
  // 更新日历视图
  selectedDate.value = new Date(val); // 根据选择的月份更新日历视图
};
// 处理点击选中日历中日期变化
const handleDateChange = (date) => {
  selectedDate.value = date;
  // 更新 calendarParam.selectedMonth为选中日期所在月份
  calendarParam.selectedMonth= dayjs(date).format("YYYY-MM");
  getCalendarData();
};
// 处理箭头点击事件
const onArrowEvent = (val) => {
  if (!calendar.value) return;
  const currentDate = dayjs(calendarParam.selectedMonth);
  // 根据点击的箭头更新月份
  let newDate;
  if (val === "prev-month") {
    newDate = currentDate.subtract(1, "month");
  } else {
    newDate = currentDate.add(1, "month");
  }

  // 更新 calendarParam.selectedMonth
  calendarParam.selectedMonth= newDate.format("YYYY-MM");
  // 更新日历视图
  calendar.value.selectDate(val);
  // 直接设置日历的日期
  calendar.value.date = newDate.toDate();
  // getCalendarData()
};

onMounted(() => {});
</script>
<style lang="scss" scoped>
.calendar-test {
  :deep(.el-calendar-table) {
    border-spacing: 10px;
    border-collapse: separate;
  }
  :deep(.el-calendar-table th) {
    padding: 0;
    height: 31px;
    background: #eef8ff;
    border-radius: 6px;
  }
  :deep(.el-calendar-table td) {
    border: 1px solid #d9eaf7;
    border-radius: 6px;
    // padding: 10px;
    transition: background-color 0.2s ease;
  }
  :deep(.el-calendar-day:hover) {
    background: none;
  }

  :deep(.current:hover) {
    background: #eef8ff;
    cursor: pointer;
  }
  :deep(.el-calendar-table td.is-selected) {
    border: 1px solid #0080ff;
  }
  :deep(.current .day) {
    color: #666;
  }
  :deep(.current .day-title) {
    color: rgba(90, 91, 97, 0.8);
  }
  :deep(.current .day-num) {
    color: var(--el-color-primary);
  }
}

.calendar-test {
    padding-top: 40px;
    padding-bottom: 60px;
    background-color: #f4f6f9;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    .calendar-test-content {
      width: 1200px;
    }
    .header-operate {
      display: flex;
      justify-content: space-between;
      align-items: center;
      .calendar-title {
        display: flex;
        align-items: center;
        justify-content: space-between;
      }
      .calendar-buttom {
        background-color: #0251d9;
        border-radius: 4px 4px 4px 4px;
        color: #fff;
        width: 30px;
        height: 30px;
        display: flex;
        justify-content: center;
        align-items: center;
        cursor: pointer;
      }
    }
    .date-cell {
      display: flex;
      flex-direction: column;
      justify-content: space-around;
      .day {
        font-size: 18px;
        font-weight: bold;
      }
      .day-content {
        display: flex;
        justify-content: space-between;
        align-items: center;
        .day-title {
          font-size: 12px;
        }
        .day-num {
          font-size: 24px;
          font-weight: bold;
        }
      }
    }
  }
.date-text {
  margin: 0 12px;

  :deep(.el-input) {
    .el-input__wrapper {
      box-shadow: none !important;
      padding: 0;
      background: none;
    }

    .el-input__inner {
      color: #030411;
      font-size: 18px;
      font-weight: 700;
      text-align: center;
    }

    // 隐藏日历图标
    .el-input__suffix,
    .el-input__prefix {
      display: none;
    }
  }
}
</style>