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当进入页面时可以自动选定当前年月

HTML：

<template>
  <div class="app-container">
    <el-form
    >
      <el-form-item label="选择月份">
        <div class="block">
          <el-date-picker
            v-model="selectofearmonth"
            type="month"
            placeholder="选择查询月份"
          >
          </el-date-picker>
        </div>
      </el-form-item>
    </el-form>

    <el-table :data="effect_salesList">
      <el-table-column label="年份" align="center" prop="syear" />
      <!-- <el-table-column label="季度" align="center" prop="squarter"  /> -->
      <el-table-column label="月份" align="center" prop="smonth" />
      <!-- <el-table-column label="部门名称" align="center" prop="deptLine"/> -->
    </el-table>

    <pagination
      v-show="total > 0"
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList"
    />
  </div>
</template>

JS：

<script>
import {listEffect_sales} from "@/api/person/sales";
import {} from "@/utils/ruoyi";
export default {
  name: "sales",
  data() {
    return {
      // 总条数
      total: 0,
      // 表格数据
      effect_salesList: [],
      // 弹出层标题
      title: "",
      selectofearmonth: "",
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        syear: "",
        smonth: "",
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {},
    };
  },
  watch: {
    selectofearmonth: {
      handler(newVal, oldVal) {
        this.queryParams.syear = this.parseTime(newVal, "{y}");
        this.queryParams.smonth = this.parseTime(newVal, "{m}");
        this.getList();
      },
    },
  },
  created() {
    this.getList();
    //设置默认值为this.selectofearmonth
    this.selectofearmonth = this.parseTime(new Date(), "{y}-{m}");
    //截取字符串 yyyy-mm 赋初值  
    this.queryParams.syear = parseInt(this.selectofearmonth)
    this.queryParams.smonth = parseInt(this.selectofearmonth.substring(4).substring(0).substring(1));
  },
  methods: {
    /** 查询表 */
    getList() {
      listEffect_sales(this.queryParams).then((response) => {
        this.effect_salesList = response.rows;
        this.total = response.total;
      });
    },

  },
};
</script>

// "@/utils/ruoyi"组件中日期格式化
export function parseTime(time, pattern) {
	if (arguments.length === 0 || !time) {
		return null
	}
	const format = pattern || '{y}-{m}-{d} {h}:{i}:{s}'
	let date
	if (typeof time === 'object') {
		date = time
	} else {
		if ((typeof time === 'string') && (/^[0-9]+$/.test(time))) {
			time = parseInt(time)
		} else if (typeof time === 'string') {
			time = time.replace(new RegExp(/-/gm), '/');
		}
		if ((typeof time === 'number') && (time.toString().length === 10)) {
			time = time * 1000
		}
		date = new Date(time)
	}
	const formatObj = {
		y: date.getFullYear(),
		m: date.getMonth() + 1,
		d: date.getDate(),
		h: date.getHours(),
		i: date.getMinutes(),
		s: date.getSeconds(),
		a: date.getDay()
	}
	const time_str = format.replace(/{(y|m|d|h|i|s|a)+}/g, (result, key) => {
		let value = formatObj[key]
		// Note: getDay() returns 0 on Sunday
		if (key === 'a') { return ['日', '一', '二', '三', '四', '五', '六'][value] }
		if (result.length > 0 && value < 10) {
			value = '0' + value
		}
		return value || 0
	})
	return time_str
}

结果图：（10月后台无数据）

点击其他月份：