vue 获取上一周和获取下一周的日期时间

<template>
  <div>
    <div style="padding: 20px 0;">
      <div style="margin-left: 10px; border-left: 5px solid #0079fe; font-size: 22px; font-weight: 600; padding-left: 10px">工作计划</div>
      <div style="margin-left: 50px; padding-right: 50px; margin-right: 50px">
        <div style="display:flex; justify-content: center; margin-top: 5vh; margin-bottom: 5vh; align-items: center">
          <div style="cursor: pointer; background-color: #39b54a; padding: 10px 50px 11px; border-radius: 20px; color: #fff; margin-right: 15px" @click="getPreviousWeekDates">上一周</div>
          <div style=" cursor: pointer; background-color: #0081ff; padding: 11px 50px 10px; border-radius: 20px; color: #fff" @click="getNextWeekDates">下一周</div>
        </div>
        <div>
          <table id="myTable">
            <tr>
              <th style="width: 70px; position: relative">
                <div class="ss"></div>
              </th>
              <th v-for="item in nowDate" :key="item.nyr">
                <div style="font-size: 18px">{{ item.nyr }}</div>
                <div style="font-size: 16px">{{item.xq }}</div>
              </th>
            </tr>
            <tbody>
            <tr>
              <td rowspan="8" style="background-color: #d7d7d7; width: 50px;">账号姓名</td>
              <td rowspan="8" v-for="item in nowDate" :key="item.nyr">
                <el-input
                  type="textarea"
                  :rows="17"
                  @blur="fsqq"
                  placeholder="请输入内容"
                  v-model="item.content">
                </el-input>
              </td>
            </tr>
            </tbody>
          </table>
        </div>
      </div>
    </div>
  </div>
</template>
<script>
export default {
  name: 'index',
  data() {
    return {
      nowDate: [],
      i: 0,
      y: 0,
      syz: [],
      xyz: []
    }
  },
  mounted() {
    this.getWeekDates();
    let width= window.innerWidth;
    console.log(width)
  },
  methods: {
    fsqq() {
    },
    getWeekDates() {
      let date = new Date()
      let day = date.getDay()
      let diff = date.getDate() - day + (day === 0 ? -6 : 1) // 获取所在周的第一天
      let weekStart = new Date(date.setDate(diff))
      let weekDates = []
      for (let i = 0; i < 7; i++) {
        let currentDate = new Date(weekStart)
        currentDate.setDate(weekStart.getDate() + i)
        weekDates.push(currentDate)
      }
      weekDates.forEach((date) => {
        let year = date.getFullYear()
        let month = (date.getMonth() + 1).toString().padStart(2, '0')
        let day = date.getDate().toString().padStart(2, '0')
        let dayOfWeek = new Intl.DateTimeFormat('zh-CN', { weekday: 'long' }).format(date)
        console.log(year + '-' + month + '-' + day + ' (' + dayOfWeek + ')')
        this.nowDate.push({
          nyr: year + '-' + month + '-' + day,
          xq: dayOfWeek
        })
      })
    },
    getPreviousWeekDates() {
      this.nowDate = [];
      this.syz = []
      if (this.y > 0) {
        this.y = this.y - 1
      }
      this.i = this.i + 1
      let weeksAgo = this.i
      let today = new Date()
      if (this.xyz.length > 0) {
        today = new Date(this.xyz[0].nyr)
      }
      let firstDayOfWeek = today.getDate() - today.getDay() + (today.getDay() === 0 ? -6 : 1) // 获取本周的第一天
      let startingDate = new Date(today.setDate(firstDayOfWeek))
      let weekDates = []
      for (let i = 0; i < weeksAgo; i++) {
        startingDate.setDate(startingDate.getDate() - 7) // 递减起始日期
        for (let j = 0; j < 7; j++) {
          let currentDate = new Date(startingDate)
          currentDate.setDate(startingDate.getDate() + j)
          weekDates.push(currentDate)
        }
      }
      let remaining = []
      if (this.i > 1) {
        remaining = weekDates.slice((this.i - 1) * 7)
      } else {
        remaining = weekDates
      }
      remaining.forEach((date) => {
        let year = date.getFullYear()
        let month = (date.getMonth() + 1).toString().padStart(2, '0')
        let day = date.getDate().toString().padStart(2, '0')
        let dayOfWeek = new Intl.DateTimeFormat('zh-CN', { weekday: 'long' }).format(date)
        this.syz.push({
          nyr: year + '-' + month + '-' + day,
          xq: dayOfWeek
        })
        this.nowDate.push({
          nyr: year + '-' + month + '-' + day,
          xq: dayOfWeek
        })
        console.log(year + '-' + month + '-' + day + ' (' + dayOfWeek + ')')
        // console.log(this.syz)
      })
      return weekDates
    },
    getNextWeekDates() {
      this.xyz = [];
      this.nowDate = [];
      if (this.i > 0) {
        this.i = this.i - 1
      }
      this.y = this.y + 1 // 将 this.i 的值加 1
      let weeksAgo = this.y
      let today = new Date()
      if (this.syz.length > 0) {
        today = new Date(this.syz[6].nyr)
      }
      let firstDayOfWeek = today.getDate() - today.getDay() + (today.getDay() === 0 ? -6 : 1) // 获取本周的第一天
      let startingDate = new Date(today.setDate(firstDayOfWeek))
      let weekDates = []
      for (let i = 0; i < weeksAgo; i++) {
        startingDate.setDate(startingDate.getDate() + 7) // 递增起始日期
        for (let j = 0; j < 7; j++) {
          let currentDate = new Date(startingDate)
          currentDate.setDate(startingDate.getDate() + j)
          weekDates.push(currentDate)
        }
      }
      let remaining = []
      if (this.y > 1) {
        remaining = weekDates.slice((this.y - 1) * 7) // 获取下一周的日期
      } else {
        remaining = weekDates
      }
      remaining.forEach((date) => {
        let year = date.getFullYear()
        let month = (date.getMonth() + 1).toString().padStart(2, '0')
        let day = date.getDate().toString().padStart(2, '0')
        let dayOfWeek = new Intl.DateTimeFormat('zh-CN', { weekday: 'long' }).format(date)
        this.xyz.push({
          nyr: year + '-' + month + '-' + day,
          xq: dayOfWeek
        })
        // console.log(this.xyz)
        this.nowDate.push({
          nyr: year + '-' + month + '-' + day,
          xq: dayOfWeek
        })
        console.log(year + '-' + month + '-' + day + ' (' + dayOfWeek + ')')
      })
      return weekDates
    }
  }
}
</script>
<style scoped>
.ss {
 content: "";
 position: absolute;
  width: 1px;
 height:164px; 需要手调 ，线的长度 
  top: 1px;  需要手调 ，线的位置
  left: -5px;
 background-color: white;
 display: block;
 transform: rotate(-57deg);
  transform-origin: top;
}
table {
  width: 80vw;
  border-collapse: collapse;
  border: 2px #797979 solid;
}
th, td {
  padding: 10px;
  width: 100px;
  border: 2px #797979 solid;
  text-align: center;
}
th {
  height: 10vh;
  background-color: #d7d7d7;
}
td {
  height: 40vh;
}
#operButton {
  position: absolute;
  left: 600px;
  top: 100px;
}
#operButton button {
  width: 100px;
  height: 50px;
}
</style>