请问各位大佬如何给elementui时间选择器赋值本周、本月时间？

elementui时间选择器，点击外面的今日、本月、本周传递时间给时间选择器!
所有的时间传递，比如当天时间是7月9日周二，本周就是获取周一到周日的时间？
图片说明

                    <span @click="today">今日</span>
          <span @click="theWeek">本周</span>
          <span @click="theMonth">本月</span>
          <el-date-picker @change="timeChange"  unlink-panels :picker-options="pickerOptions" class="timePicker" v-model="time" type="daterange" value-format="yyyyMMdd" format="yyyy-MM-dd" range-separator="至" start-placeholder="开始日期" end-placeholder="结束日期">
          </el-date-picker>

import chartsBase from '@base/chartsBase/chartsBase'
import moment from 'moment'

 data () {
    return {
      time: ''
      }
    }，
        methods: {
    theWeek () {
      let start = moment(moment().week(moment().week()).startOf('week').add(1, 'days').valueOf()).format('YYYY-MM-DD')
      let end = moment(moment().week(moment().week()).endOf('week').add(1, 'days').valueOf()).format('YYYY-MM-DD')
      this.time = [start, end]
    },
    today () {
      let end = new Date()
      let start = new Date()
      this.time = [start, end]
    },
    theMonth () {
      let start = moment(moment().month(moment().month()).startOf('month').valueOf()).format('YYYY-MM-DD')
      let end = moment(moment().month(moment().month()).endOf('month').valueOf()).format('YYYY-MM-DD')
      this.time = [start, end]
    }
  }