<template>
    <div style="margin-left:5%;margin-right:5%;">
      <el-row>
        <div style="height:200px">

        </div>
      </el-row>
      <el-row>
        <span>已训练完毕，聚类分为5组</span>
      </el-row>
      <el-divider></el-divider>
      <el-row style="text-align: center">
        <img src="@/assets/algorithm_demo3.png" style="margin: 0 auto;">
      </el-row>
      <el-row>
        <el-collapse v-model="activeNames" @change="handleChange">

          <el-row v-for="(item,index) in objArr">
            <el-collapse-item :title="'当前为第'+item.id+'组，共'+item.list+'条，为您展示前10条数据'" :name="index">
              <div class="infinite-list-wrapper" style="overflow:auto;height: 200px" v-infinite-scroll="load" infinite-scroll-disabled="disabled">
                <ul class="list" >
                  <li v-for="i in count" class="list-item">{{ i }}</li>
                </ul>
                <p v-if="loading">加载中...</p>
                <p v-if="noMore">没有更多了</p>
              </div>
            </el-collapse-item>
          </el-row>

        </el-collapse>
      </el-row>

    </div>
</template>

<script>
    export default {
        name: "slider3",
        data() {
          return{
            count: 10,
            loading: false,
            activeNames: ['1'],
            objArr: [
              {id: 1,
                list: 200
              },
              {
                id: 2,
                list: 2000
              },
              {
                id: 3,
                list: 5000
              },
              {
                id: 4,
                list: 4600
              },
              {
                id: 5,
                list: 30000
              }
            ]
          }
        },
      computed: {
        noMore () {
          return this.count >= 20
        },
        disabled () {
          return this.loading || this.noMore
        }
      },
      methods: {
        load () {
          this.loading = true
          setTimeout(() => {
            this.count += 2
            this.loading = false
          }, 2000)
        }
      }
    }
</script>

<style scoped>
  .el-divider{
    margin: 8px 0;
    background: 0 0;
    border-top: 1px solid #E6EBF5;
  }
</style>

发现element-ui的分割线间距有点大，且未提供虚线样式。
于是使用了下面链接文章的方式
https://blog.csdn.net/zzzsheng/article/details/104000968

在最下方直接修改原来的样式

/* el-divider 修改高度&虚线效果 */
 .el-divider--horizontal{
     margin: 8px 0;
     background: 0 0;
     border-top: 1px dashed #e8eaec;
 } 

效果图如下: