npm install element-ui

<template>
  <div class="header">
    <div class="img">
      <img src="@/assets/image/index/logo.png" alt="">
    </div>
    <el-menu
      :default-active="this.$route.path"
      class="el-menu-demo"
      mode="horizontal"
      @select="handleSelect"
      router
      background-color="#fff"
      text-color="#333"
      active-text-color="#0084ff"
      style="flex:1"
    >
      <el-menu-item v-for="(item, i) in navList" :key="i" :index="item.name">
        <template slot="title">
          <span> {{ item.navItem }}</span>
        </template>
      </el-menu-item>
    </el-menu>
  </div>
</template>

<script>
export default {
    data() {
    return {
        navList:[
            {name:'/home', navItem:'首頁'},
            {name:'/home/classRoom',navItem:'我的班級'},
            {name:'/home/course',navItem:'我的課程'},
            {name:'/home/exam',navItem:'創(chuàng)建考試'},
            {name:'/home/practice',navItem:'創(chuàng)建練習'},
        ]
                      
    }
  },
  methods: {
    handleSelect(key, keyPath) {
      }
  }
}
</script>

<style>
.el-menu-item{
  font-size: 18px !important;
}
.el-menu-item.is-active {
    color: #ea5b2c !important;
    font-size: 18px !important;
}
.el-menu--horizontal>.el-menu-item.is-active {
  border-bottom: 2px solid #ea5b2c !important;
}
</style>
<style lang="scss" scoped>
.header {
  display: flex;
  width: 100%;
  .img {
    background: #ffffff;
    border-bottom: solid 1px #e6e6e6;
    img {
      height:50px;
      padding:10px;
    }
  }
}
</style>