一、问题如下图，原始表格滚动条很丑

二、想要的效果如下

三、操作步骤
1、template部分代码

<template>
<!-- 外面的最大的父容器盒子 -->
  <div class="ccc">
    <!-- 使用el-scrollbar标签的效果 -->
    <div class="box">
      <!-- 隐藏标签scrollbar包住所有滚动内容 -->
      <el-scrollbar>
        <el-table :data="tableData" style="width: 100%">
          <el-table-column prop="date" label="日期" width="180">
          </el-table-column>
          <el-table-column prop="name" label="姓名" width="180">
          </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
        </el-table>
      </el-scrollbar>
    </div>
    <!-- 没有使用el-scrollbar标签普通容器效果 -->
    <div class="box2">
      <el-table :data="tableData" style="width: 100%">
          <el-table-column prop="date" label="日期" width="180">
          </el-table-column>
          <el-table-column prop="name" label="姓名" width="180">
          </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
          <el-table-column prop="address" label="地址" width="480"> </el-table-column>
        </el-table>
    </div>
  </div>
</template>

2、script数据部分的代码

<script>
export default {
  // 数据
  data () {
    return {
      tableData: [
        {
          date: '2016-05-02',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1518 弄'
        },
        {
          date: '2016-05-04',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1517 弄'
        },
        {
          date: '2016-05-01',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1519 弄'
        },
        {
          date: '2016-05-03',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1516 弄'
        },
        {
          date: '2016-05-04',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1517 弄'
        },
        {
          date: '2016-05-01',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1519 弄'
        },
        {
          date: '2016-05-04',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1517 弄'
        },
        {
          date: '2016-05-01',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1519 弄'
        },
        {
          date: '2016-05-03',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1516 弄'
        },
        {
          date: '2016-05-04',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1517 弄'
        },
        {
          date: '2016-05-01',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1519 弄'
        },
        {
          date: '2016-05-03',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1516 弄'
        },
        {
          date: '2016-05-04',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1517 弄'
        },
        {
          date: '2016-05-01',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1519 弄'
        },
        {
          date: '2016-05-03',
          name: '王小虎',
          address: '上海市普陀区金沙江路 1516 弄'
        }
      ]
    }
  }
}
</script>

3、css样式部分代码

<style>
.ccc .box {
  width: 100%;
  height: 400px;
  border: 1px solid red;
  margin: 0 auto;
  white-space: nowrap;
}
.ccc .el-scrollbar {
  height: 100%;
}
.ccc .box2 {
  margin-top: 50px;
  height: 200px;
  overflow: overlay;
}
  /* 最为关键得两个样式代码，可以设置全局滚动条样式，也可以按需设置 */
  .ccc ::-webkit-scrollbar {
  /* 设置竖向滚动条的宽度 */
  width: 5px;
  /* 设置横向滚动条的高度 */
  height: 5px;
}
.ccc ::-webkit-scrollbar-thumb {
  /*滚动条的背景色*/
  background-color: rgba(144,147,153,.3);
  border-radius: 35px;
  position: relative;
}
</style>