1.html元素

写出对应的数据块（注意添加ref) 用于获取元素位置

<template>
  <div class="index-page" >
       <div class="top-head" ref="index">
          <img src="logo.png" style="height: 40px;margin-right: 20px;">
          <span v-for="(item,index) in meuns" @click="scrollingTo(index)" :style="index == meunIndex? 'border-bottom: 5px solid #2461FB;color:#2461FB':''">{{item}}</span>
          <div class="head-button">
            <button>登录</button>
            <button style="color: #2461FB;background: #ffffff;">注册</button>
          </div>
       </div>
       <div class="top-slogan">
           <div>产品与服务XX介绍</div>
           <span v-for="item in texts" >{{item}}</span>
           <button>立即注册 -></button>
       </div>
       <div class="information-block" style="margin-top: -200px;background: #ce4a92">
            <div class="title">产品与服务XX</div>
       </div>
        <div class="information-block">
          <div class="title">收益说明</div>
          <div class="title-xia">使您XX的现场XX显下降</div>
        </div>

      <div class="information-block" style="background: #c4ce93">
        <div class="title">功能亮点说明</div>
        <div class="title-xia">一旦使用XX，现场工艺XX力将急剧提高</div>
      </div>

    <div class="information-block">
      <div class="title">服务流程</div>
    </div>

    <div ref="productOverview" class="information-block" style="background: #ce7a7e">
      <div class="title">产品概览</div>
      <div class="title-xia">XX平台</div>
    </div>

    <div class="information-block" style="background: #599ece">
      <div class="title">专业可靠的XX服务商</div>
    </div>

    <div ref="edgeDevices" class="information-block" style="background: #cdce4c">
      <div class="title">XX设备</div>
      <div class="title-xia">通过XX托管服务</div>
    </div>
    <div ref="companyCase" class="information-block" style="background: #13ce66">
      <div class="title">公司案例介绍</div>
      <div class="title-xia">为XX产品与服务</div>
    </div>

  </div>
</template>

2.styley样式区域

给数据快添加样式以便更好体现效果

<style lang="scss" scoped>
  .top-head{
    position: fixed;
    display: flex;
    top: 0;
    width: 100%;
    background: rgba(255,255,255,0.7);
    padding: 10px 100px;
    z-index: 10;
  }
  .top-head span{
    line-height: 30px;
    padding: 10px 10px;
    margin: 0 10px;
    cursor: pointer;
  }
  .head-button{
    position: absolute;
    right: 100px;
    height: 60px;
    padding-top: 10px;
  }
  .head-button button{
    cursor: pointer;
    background: #2461FB;
    border-radius: 10px;
    border: none;
    color: #ffffff;
    padding: 8px 30px;
    margin-right: 10px;
    border: 2px solid #2461FB;
  }
  .top-slogan{
    background: #8afbee;
    background-size: 100% 100%;
    width: 100%;
    height: 800px;
    padding: 260px 100px;
  }
  .top-slogan div{
    padding: 30px 10px;
    font-size: 32px;
    font-weight: 800;
  }
  .top-slogan span{
    padding: 5px 10px;
    font-size: 16px;
    display: block;
    width: 500px;
  }
  .top-slogan button{
     background: #2461FB;
     border-radius: 10px;
     border: none;
     color: #ffffff;
     padding: 10px 30px;
     margin-top: 60px;
     cursor: pointer;
  }
  .information-block{
    margin: 0 100px 20px;
    border-radius: 20px;
    box-shadow: 4px 4px 40px rgba(0, 0, 0, .05);
    height: 1000px;
    background: #0a76a4;
  }
  .information-block .title{
    font-size: 24px;
    color: #000000;
    font-weight: 800;
    text-align: center;
    margin: 10px 0;
    padding-top: 20px;
  }
  .information-block .content{
    margin: 10px 10%;
    width: 80%;
  }
  .information-block .title-xia{
    font-size: 16px;
    color: #697382;
    text-align: center;
    margin: 10px 0;
  }
</style>

3.最后添加js代码

实现最终效果

<script>
  export default {
    name: 'index',
    data() {
      return {
        meuns:['首页','产品','案例','关于'],
        meunrefs:['index','productOverview','edgeDevices','companyCase'],
        meunIndex: 0,
      }
    },
    mounted() {
      // 监听页面滚动事件
      window.addEventListener("scroll", this.scrolling);
    },
    methods: {
      scrolling() {
        const scrollTop = window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop;
        let meunScrolling = this.getScrollTop();
        for(let i in meunScrolling){
          if(scrollTop <= meunScrolling[i]){
            this.meunIndex = i;
            return;
          }
        }
        this.meunIndex = 3;
      },
      getScrollTop(){
        let tops = []
        for (let  i = 1;i < this.meunrefs.length;i++){
          let ref = this.meunrefs[i];
          let top = this.$refs[ref].getBoundingClientRect().top + window.scrollY - 120;
          tops.push(top);
        }
        return tops;
      },
      scrollingTo(num){
        let top = 0;
        if(num !== 0){
          let ref = this.meunrefs[num];
          top = this.$refs[ref].getBoundingClientRect().top + window.scrollY - 100;
        }
        window.scrollTo({top: top, behavior: "smooth"});
        setTimeout(()=>{this.meunIndex = num;},100)
      }
    },
    beforeDestroy() {
      window.removeEventListener("scroll", this.scrolling);
    },
  }
</script>

最终效果