前言

	本文是根据项目实际开发中一个需求开发的demo，仅用了elementUI，可当作独立组件使用，C V即用。
当然没考虑其他的扩展性和一些数据的校验，主要是提供一个处理思路，有需要的小伙伴可以直接复制；
	本demo的思路是根据开始时间和结束时间动态生成工程时间表，再根据工程的计划开始和结束日期、
实际开始和结束日期再对应单元格生成进度条，最后根据完成进度百分比计算红色进度条。

一、demo成品图

表格使用的是elementUI，表头是动态的，根据开始日期的年月和结束时间的年月计算获取；
单元格第一行绿色进度条是计划工程进度，第二行绿色是实际功能进度条，红色是实际进度的百分比

二、代码

<template>
  <div class="app-container">
    <el-table :data="tableData" style="width: 100%">
      <el-table-column label="名称" prop="name" width="200"></el-table-column>
      <el-table-column align="center" v-for="(months, year) in dateList" :key="year"  :label="`${year}年`">
        <el-table-column v-for="month in months" align="center" width="100" :key="month" :label="`${month}月`">
          <template slot-scope="scope">
            <div class="process-box" v-if="scope.row.plan_process[year] && scope.row.plan_process[year].includes(month) || scope.row.actual_process[year] && scope.row.actual_process[year].includes(month)">
              <div class="plan-process" v-if="scope.row.plan_process[year] && scope.row.plan_process[year].includes(month)">
                <div class="item" v-if="scope.row.planSameYearMonth" :style="scope.row.planProcessStyle"></div>
                <div v-else>
                  <div class="item start" v-if="scope.row.plan_start.Y == year && scope.row.plan_start.M == month" :style="scope.row.plan_start.itemStyle"></div>
                  <div class="item end" v-if="scope.row.plan_end.Y == year && scope.row.plan_end.M == month" :style="scope.row.plan_end.itemStyle"></div>
                  <div class="item" v-if="!(scope.row.plan_start.Y == year && scope.row.plan_start.M == month || scope.row.plan_end.Y == year && scope.row.plan_end.M == month)"></div>
                </div>
              </div>
              <div class="actual-process" v-if="scope.row.actual_process[year] && scope.row.actual_process[year].includes(month)">
                <div class="item" v-if="scope.row.actualSameYearMonth" :style="scope.row.actualProcessStyle">
                  <div class="percent_item start" v-if="scope.row.percentSameYearMonth" :style="scope.row.percentProcessStyle"></div>
                </div>
                <div class="item-box" v-else>
                  <div class="item start" v-if="scope.row.actual_start.Y == year && scope.row.actual_start.M == month" :style="scope.row.actual_start.itemStyle">
                    <div class="percent_item start" v-if="scope.row.percent_process[year] && scope.row.percent_process[year].includes(month) && scope.row.percent_start.Y == year && scope.row.percent_start.M == month" :style="scope.row.percent_start.itemStyle"></div>
                  </div>
                  <div class="item end" v-if="scope.row.actual_end.Y == year && scope.row.actual_end.M == month" :style="scope.row.actual_end.itemStyle">
                    <div class="percent_item end" v-if="scope.row.percent_process[year] && scope.row.percent_process[year].includes(month) && scope.row.percent_end.Y == year && scope.row.percent_end.M == month" :style="scope.row.percent_end.itemStyle"></div>
                  </div>
                  <div class="item" v-if="!(scope.row.actual_start.Y == year && scope.row.actual_start.M == month || scope.row.actual_end.Y == year && scope.row.actual_end.M == month)">
                    <div class="percent_item" v-if="scope.row.percent_process[year] && scope.row.percent_process[year].includes(month) && scope.row.percent_end.Y == year && scope.row.percent_end.M == month" :style="scope.row.percent_end.itemStyle"></div>
                    <div class="percent_item" v-if="scope.row.percent_process[year] && scope.row.percent_process[year].includes(month) && !(scope.row.percent_end.Y == year && scope.row.percent_end.M == month)"></div>
                  </div>
                </div>
              </div>
            </div>
            
          </template>
        </el-table-column>
      </el-table-column>
    </el-table>
  </div>
</template>
<script>
export default {
  data() {
    return {
      tableData: [
        {
          name: "单位A施工期间",
          plan_start_time: "2023-02-1",
          plan_end_time: "2023-2-28",
          actual_start_time: "2023-2-7",
          actual_end_time: "2023-6-22",
          percent: 85,
        },
        {
          name: "单位B施工期间",
          plan_start_time: "2023-07-12",
          plan_end_time: "2024-01-12",
          actual_start_time: "2023-11-10",
          actual_end_time: "2024-01-10",
          percent: 76,
        }
      ],
      dateList: {},
    }
  },
  mounted(){
    this.initTableData("2023-01-12", "2025-01-30")
  },
  methods: {
    handleDate(date) {
      let monthHasDay = 30;
      let currentDate = new Date(date)
      let day = currentDate.getDate()
      let month = currentDate.getMonth() + 1;
      let year = currentDate.getFullYear();
      if ([1, 3, 5, 7, 8, 10, 12].includes(month)) {
        monthHasDay = 31
      } else {
        if (month === 2) {
          if ((year % 400 === 0) || (year % 4 === 0 && year % 100 !== 0)) {
            monthHasDay = 29;
          } else {
            monthHasDay = 28;
          }
        } else {
          monthHasDay = 30;
        }
      }
      return {d: day, M: month, Y: year, monthHasDay: monthHasDay}
    },
    getDataBetweenDates(startTime, endTime){
      let start = this.handleDate(startTime);
      let end = this.handleDate(endTime);
      let data = {}
      data[start.Y] = [];
      data[end.Y] = [];
      let year = end.Y - start.Y
      if (year === 0) {
        for(let m = start.M; m <= end.M; m++) {
          data[start.Y].push(m)
        }
      } else if (year === 1) {
        for(let m = start.M; m <= 12; m++) {
          data[start.Y].push(m)
        }
        for(let n = 1; n <= end.M; n++) {
          data[end.Y].push(n)
        }
      } else {
        for(let m = start.M; m <= 12; m++) {
          data[start.Y].push(m)
        }
        for(let mid = 1; mid < year; mid++) {
          data[start.Y + mid] = [1,2,3,4,5,6,7,8,9,10,11,12];
        }
        for(let n = 1; n <= end.M; n++) {
          data[end.Y].push(n)
        }
      }
      return data;
    },
    getDaysBetweenDates(startTime, endTime) {
      let d1 = new Date(startTime);
      let d2 = new Date(endTime);
      let timeDiff = Math.abs(d2.getTime() - d1.getTime());
      let days = Math.ceil(timeDiff / (1000 * 3600 * 24));
      return days;
    },
    handleDateStyle(startDate, endDate){
      let start = this.handleDate(startDate)
      let end = this.handleDate(endDate);
      let sameYearMonth = false;
      let processStyle = null;
      if (end.Y === start.Y && end.M === start.M) {
        processStyle = {
          "left": ((start.d - 1) * 100 / start.monthHasDay) + "%",
          "right": ((start.monthHasDay -  end.d) * 100 / start.monthHasDay) + "%",
          "border-radius": '4px'
        }
        if (end.d > start.monthHasDay) processStyle.right = 0
        sameYearMonth = true
      } else {
        start.itemStyle = {
          "left": ((start.d + 1)  * 100 / start.monthHasDay)  + "%",
          "right": 0
        }
        end.itemStyle = {
          "left": 0,
          "right": ((start.monthHasDay -  (end.d + 1))  * 100 / start.monthHasDay)  + "%"
        }
      }
  
      return {
        start: start,
        end: end,
        sameYearMonth: sameYearMonth,
        processStyle: processStyle
      }
    },
    handlePercentDateStyle(actualStartTime, actualEndTime, percent){
      let start = this.handleDate(actualStartTime)
      let end = this.handleDate(actualEndTime);
      let days = this.getDaysBetweenDates(actualStartTime, actualEndTime)
      let percentTime = new Date(actualStartTime).getTime() +  days * percent * 24 * 36000
      let percentProcess = this.getDataBetweenDates(actualStartTime, percentTime)
      let startBorderRadius = '4px 0 0 4px' 
      let endBorderRadius = '0 4px 4px 0'
      let percentDate = this.handleDate(percentTime)
      let sameYearMonth = false;
      let processStyle = null;
      if (end.Y === start.Y) {
        if (end.M === start.M) {
          processStyle = {
            "left": 0,
            "right": ((end.d -  (percentDate.d)) * 100 / end.d) + "%",
            "border-radius": '4px'
          }
          sameYearMonth = true
        } else {
          if(percentDate.M === start.M) {
            start.itemStyle = {
              "left": 0,
              "right": ((start.monthHasDay -  percentDate.d)  * 100 / (start.monthHasDay - start.d))  + "%",
              "border-radius": '4px'
            }
            percentDate.itemStyle = {
              "left": 0,
              "right": ((start.monthHasDay -  percentDate.d)  * 100 / start.monthHasDay)  + "%",
              "border-radius": '4px'
            }
          } else if (percentDate.M > start.M &&  percentDate.M < end.M) {
            start.itemStyle = {
              "left": 0,
              "right": 0,
              "border-radius": startBorderRadius
            }
            percentDate.itemStyle = {
              "left": 0,
              "right": ((percentDate.monthHasDay - percentDate.d)  * 100 / percentDate.monthHasDay)  + "%",
              "border-radius": endBorderRadius
            }
          } else if (percentDate.M === end.M) {
            start.itemStyle = {
              "left": 0,
              "right": 0,
              "border-radius": startBorderRadius
            }
            percentDate.itemStyle = {
              "left": 0,
              "right": ((end.d -  percentDate.d)  * 100 / end.d)  + "%",
              "border-radius": endBorderRadius
            }
          }
        }
      } else {
        
        if (percentDate.M === start.M) {
          start.itemStyle = {
            "left": 0,
            "right": ((start.monthHasDay -  percentDate.d) * 100 / (start.monthHasDay - start.d)) + "%",
            "border-radius": '4px'
          }
        } else if (percentDate.M === end.M && percentDate.Y === end.Y) {
          start.itemStyle = {
            "left": 0,
            "right": 0,
            "border-radius": startBorderRadius
          }
          percentDate.itemStyle = {
            "left": 0,
            "right": ((end.d -  percentDate.d)  * 100 / end.d)  + "%",
            "border-radius": endBorderRadius
          }
        } else {
          start.itemStyle = {
            "left": 0,
            "right": 0,
            "border-radius": startBorderRadius
          }
          percentDate.itemStyle = {
            "left": 0,
            "right": ((percentDate.monthHasDay - percentDate.d)  * 100 / percentDate.monthHasDay)  + "%",
            "border-radius": endBorderRadius
          }
        }
      }
   
      return {
        start: start,
        end: percentDate,
        sameYearMonth: sameYearMonth,
        processStyle: processStyle,
        percentProcess: percentProcess
      }
    },
    initTableData(startTime, endTime){
      this.dateList = this.getDataBetweenDates(startTime, endTime);
      
      this.tableData.map(item => {
        item.plan_process = this.getDataBetweenDates(item.plan_start_time, item.plan_end_time);
        item.actual_process = this.getDataBetweenDates(item.actual_start_time, item.actual_end_time);
        let dateStyle = this.handleDateStyle(item.plan_start_time,item.plan_end_time) ;
        item.planSameYearMonth = dateStyle.sameYearMonth;
        item.planProcessStyle = dateStyle.processStyle ? dateStyle.processStyle : '';
        item.plan_start = dateStyle.start;
        item.plan_end = dateStyle.end;
        let actualDateStyle = this.handleDateStyle(item.actual_start_time,item.actual_end_time);
        item.actualSameYearMonth = actualDateStyle.sameYearMonth;
        item.actualProcessStyle = actualDateStyle.processStyle ? actualDateStyle.processStyle : '';
        item.actual_start = actualDateStyle.start;
        item.actual_end = actualDateStyle.end;
        let percentDateStyle = this.handlePercentDateStyle(item.actual_start_time, item.actual_end_time, item.percent);
        item.percent_start = percentDateStyle.start;
        item.percent_end = percentDateStyle.end;
        item.percentProcessStyle = percentDateStyle.processStyle ? percentDateStyle.processStyle : '';
        item.percentSameYearMonth = percentDateStyle.sameYearMonth;
        item.percent_process = percentDateStyle.percentProcess
        console.log(item)

      })
    },
    
  },
}
</script>
<style lang="scss" scoped>
::v-deep .el-table td.el-table__cell div{
  padding: 0;
}
.process-box{
  width: 100px;
  height: 40px;
  position: relative;
  .plan-process{
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 15px;
  }
  .actual-process{
    position: absolute;
    top: 25px;
    left: 0;
    right: 0;
    height: 15px;
  }
  .percent_item{
    position: absolute;
    height: 15px;
    left: 0;
    right: 0;
    background-color: red;
  }

}
.item {
  position: absolute;
  left: 0;
  right: 0;
  background: greenyellow;
  height: 15px;
  &.start{
    border-radius: 4px 0 0 4px;
  }
  &.end{
    border-radius: 0 4px 4px 0 ;
  }
}

</style>