npm install vue-scrollbar-custom --save-dev

import vScrollbar from 'vue-scrollbar-custom'

export default {
  name: 'app',
  components: {
    vScrollbar
  }
}

  import vScrollbar from 'vue-scrollbar-custom'
  Vue.component('v-scrollbar', vScrollbar)

 props: {
    isTopBar: { // 是否为顶部滚动条
      type: Boolean,
      default: false
    },
    isHideBar: { // 是否在鼠标不在滚动区域时隐藏滚动条
      type: Boolean,
      default: false
    },
    barContainerStyle: { // 滚动条容器样式对象
      type: Object,
      default: function () {
        return {
          width: '8px',
        }
      }
    },

    barStyle: {  // 容器内滚动条样式对象
      type: Object,
      default: function () {
        return {
          width: '6px',
          borderRadius: this.isHideBar ? '3px' : '',
          background: '#ccc'
        }
      }
    },
    topBarStyle: { // 顶部滚动条样式对象(一般只设置高度和背景色)
      type: Object,
      default: function () {
        return {
          height: '3px',
          backgroundColor: '#17ce28'
        }
      }
    }
  },

<v-scrollbar class="vScrollbar1" @scroll="scrollFn">
    <h1 v-for="n in 30">default</h1>
</v-scrollbar>

 scrollFn(e) {
      console.log(e.target.className)
      console.log(e.target.scrollTop)
    }