css -- vue侧边栏

<template>
  <div class="navbar_left">
    <li>
      <div class="navbar_left_o">
        <i class="el-icon-user" v-on:mouseover="change1Active($event)" v-on:mouseout="remove1Active($event)"></i>
      </div>
      <div class="navbar_left_o_r box">
        <div>
          <div class="">
            <i class="el-icon-user"></i>
          </div>
          <div>
            <span>在线客服</span>
            <span>工作日 9:00 - 18:00</span>
          </div>
          <div>
            <img src="../assets/image/QRCode.png">
          </div>
        </div>
        <div
          style="width:100%; border-top: 1px solid #F2F2F2;padding-top: 10px;text-align: center;font-size:14px;color:#999999 ;">
          添加微信客服 在线解决问题
        </div>
      </div>
    </li>
    <li>
      <div class="navbar_left_o">
        <i class="el-icon-phone-outline" v-on:mouseover="change2Active($event)"
           v-on:mouseout="remove2Active($event)"></i>
      </div>
      <div class="navbar_left_o_r box">
        <div class="">
          <i class="el-icon-phone-outline"></i>
        </div>
        <div>
          <span>123456</span>
          <span>12小时客服服务热线</span>
        </div>
      </div>
    </li>
    <li>
      <div class="navbar_left_o">

        <a href="home">
          <i class="el-icon-eleme" v-on:mouseover="change3Active($event)" v-on:mouseout="remove3Active($event)">
          </i>
        </a>

      </div>
    </li>
  </div>
</template>
<script>
  export default {
    name: "MyNavbar",
    data() {
      return {};
    },
    mounted() {
      // 此处true需要加上，不加滚动事件可能绑定不成功
      window.addEventListener("scroll", this.handleScroll, true);
    },
    destroyed() {
      window.removeEventListener('scroll', this.scrollToTop)
    },
    methods: {
      change1Active($event) {
        $event.currentTarget.className = "el-icon-user-solid  avtive";
      },
      remove1Active($event) {
        $event.currentTarget.className = "el-icon-user";
      },
      change2Active($event) {
        $event.currentTarget.className = " el-icon-phone avtive";
      },
      remove2Active($event) {
        $event.currentTarget.className = "el-icon-phone-outline";
      },
      change3Active($event) {
        $event.currentTarget.className = "el-icon-platform-eleme avtive";
      },
      remove3Active($event) {
        $event.currentTarget.className = "el-icon-eleme";
      },

    }
  }
</script>
<style>
  .navbar_left {
    position: fixed;
    right: 15px;
    bottom: 20%;
    z-index: 9999;
  }

  .navbar_left li {
    list-style: none;
    background: #fff;
    margin-bottom: 5px;
    padding: 5px 0;
    position: relative;
    top: 0;
    box-shadow: 1px 1px 1px 1px rgba(0, 0, 0, .1);
    height: 40px;
    width: 50px;
    cursor: pointer;
  }

  .navbar_left_o {
    margin: 0;
    padding: 0;
    font-size: 30px;
  }

  .navbar_left_o i {
    line-height: 40px;
    color: #999;
    text-align: center;
    display: block;
  }

  .navbar_left_o_r {
    position: absolute;
    background: #fff;
    right: 140%;
    top: -150%;
    box-shadow: 1px 1px 1px 1px rgba(0, 0, 0, .1);
    padding: 15px;
    width: 350px;
  }

  .navbar_left_o_r img {
    margin: 10px 0 10px 0;
    width: 100px;
    height: 100px;
    line-height: 123px;

  }

  .navbar_left_o_r div {
    float: left;
  }

  .navbar_left_o_r i {
    font-size: 40px;
    color: #ffc001;
    line-height: 123px;
  }

  .navbar_left_o_r span:nth-child(1) {
    margin: 20px 20px 20px 20px;
    color: #ffc001;
    display: block;
    font-size: 24px;
    line-height: 42px;
  }

  .navbar_left_o_r span:nth-child(2) {
    margin: 0 20px 20px 20px;
    color: #999999;
    display: block;
    font-size: 14px;
    line-height: 42px;
  }

  .navbar_left > li:hover > .box {
    display: block;
  }

  .box {
    display: none;
  }

  .navbar_left_o .avtive {
    color: #ffc001;
  }
</style>

实现效果

来源：CSDN

作者：泠苍

链接：https://blog.csdn.net/weixin_42655997/article/details/103800798