element ui datepicker时间控件实现范围选择周，季，年。

因项目要求，需日，周，月，季，年五种日期范围选择器，故参考文章（在末尾）后分享

一.效果图

二、版本及下载
1.实现需要修改源码，目前修改的版本为2.15.3，所以想要实现该方法，请先将elementui升级或者降到2.15.3.

2.将lib包替换到node_module/element-ui下的lib
lib包下载地址
https://download.csdn.net/download/qq_39019765/44321511

具体参考：原文链接：https://blog.csdn.net/m0_67391518/article/details/123266454

三、代码中的使用

此为utils下的common.js文件，用于处理周选择器显示

//将日期转换成一年中的第几周
export function getYearWeek(date) {
    //按照国际标准
    let time,
        week,
        checkDate = new Date(date);
    checkDate.setDate(checkDate.getDate() + 4 - (checkDate.getDay() || 7));
    time = checkDate.getTime();
    checkDate.setMonth(0);
    checkDate.setDate(1);
    week = Math.floor(Math.round((time - checkDate) / 86400000) / 7) + 1;
    return week;
}

//返回格式 2019年第23周，特别注意跨年一周的问题
export function getYearAndWeek(date, anotherDate) {
    let week = getYearWeek(date);
    let year = date.substring(0, 4);
    let anotherYear = anotherDate.substring(0, 4);
    //处理跨年特殊日期
    if (anotherDate > date) {
        let betweenDay = getBetweenDay(new Date(date), new Date(anotherDate));
        if (betweenDay == 7 && anotherYear != year) {
            if (week == 1) {
                year = parseInt(year) + 1;
            }
        }
    } else {
        let betweenDay = getBetweenDay(new Date(anotherDate), new Date(date));
        if (betweenDay == 7 && anotherYear != year) {
            if (week != 1) {
                year = parseInt(year) - 1;
            }
        }
    }
    return `${year}年第${week}周`;
}
export function getBetweenDay(beginDate, endDate) {
    let dateSpan = endDate - beginDate;
    dateSpan = Math.abs(dateSpan);
    let days = Math.floor(dateSpan / (24 * 3600 * 1000));
    return days + 1;
}

type新增季选择器：quarterrange，年选择器：yearrange，周选择器直接在日选择器daterange上修改的，通过添加format来进行判断

代码中，通过添加key值实现点击切换，判断timeName是否为周来进行周选择器处理数据

<el-date-picker
    ref="refDatePicker"
    v-model="birthday"
    :type="TimeType"
    :key="TimeType"
    @change="changeDate"
    :format="timeName === '周' ? format : ''"
    start-placeholder="开始日期"
    end-placeholder="结束日期"
    :picker-options="pickerOptions"
    value-format="yyyy-MM-dd">
</el-date-picker>

// 引入common的getYearAndWeek用于处理周选择器
import { getYearAndWeek } from "@/utils/common.js"

<script>
import { getYearAndWeek } from "@/utils/common.js"
import dayjs from 'dayjs'  // 引入dayjs
export default {
  data() {
     // 处理点击切换type时选择器的层级问题
    const clickFuncGenerator = (picker, type, text) => {
      this.TimeType = type
      picker.$emit('pick', new Date())
      setTimeout(() => {
        this.$refs.refDatePicker.focus()
        this.timeName = text
      }, 200)
    }
    return {
      TimeType:'daterange',
      dataForm:{},
      time: "week",
      timeName:"",
      birthday: '',
      pickerOptions: {
        firstDayOfWeek: 1,
        shortcuts: [{
          text: '日',
          onClick: picker => clickFuncGenerator(picker, 'daterange', '日')
        }, {
          text: '周',
          onClick: picker => clickFuncGenerator(picker, 'daterange', '周')
        }, {
          text: '月',
          onClick: picker => clickFuncGenerator(picker, 'monthrange', '月')
        }, {
          text: '季',
          onClick: picker => clickFuncGenerator(picker, 'quarterrange', '季')
        }, {
          text: '年',
          onClick: picker => clickFuncGenerator(picker, 'yearrange', '年')
        }]
      },
    };
  },
  computed: {
    //用于处理周选择器
    format: {
      get() {
        let timeType = this.time;
        let date = this.birthday;
        if ("week" == timeType && date && date.length > 0) {
          let beginYearWeek = getYearAndWeek(date[0], date[1]);
          let endYearWeek = getYearAndWeek(date[1], date[0]);
          return beginYearWeek + endYearWeek;
        } else {
          return "";
        }
      }
    }
  }
  methods: {
    changeDate() {
      if (this.birthday) { // 如果已选择
        if (this.timeName !== '周') {
          this.advancedSearch.beginTime = this.birthday[0]
          this.advancedSearch.endTime = this.birthday[1]
          this.getDataList()
        } else {  // 如果是周选择器，引入day用于处理周选择器，开始和结束的周时间加1天
          this.advancedSearch.beginTime = dayjs(this.birthday[0]).startOf('week').add(1, 'day').format('YYYY-MM-DD')
          this.advancedSearch.endTime = dayjs(this.birthday[1]).endOf('week').add(1, 'day').format('YYYY-MM-DD')
          this.getDataList()
        }
      } else {
        this.advancedSearch.beginTime = ''
        this.advancedSearch.endTime = ''
        this.getDataList()
      }
    },
  },
};
</script>

dayjs的官方网站Day.js中文网

此文参考：

1.vue elementui时间控件，（单框同时选）范围选择周，季，年。_打杂的程序员的博客-CSDN博客_vue 时间控件

2.element-ui中的el-date-picker日期选择器, 周选择器获取当前选中周，并显示当日期时间段_八神异步的博客-CSDN博客_el-date-picker 选择周