vue と Element-plus を使用してマルチレベルのメニューとナビゲーション バーを実装する方法

vue create vue-menu-navigation
cd vue-menu-navigation

npm install element-plus --save

<template>
  <div>
    <el-menu :default-active="activeIndex" mode="horizontal" @select="handleSelect">
      <el-menu-item index="1">首页</el-menu-item>
      <el-submenu index="2">
        <template #title>产品</template>
        <el-menu-item-group>
          <template #title>手机</template>
          <el-menu-item index="2-1">iPhone</el-menu-item>
          <el-menu-item index="2-2">华为</el-menu-item>
        </el-menu-item-group>
        <el-menu-item-group>
          <template #title>电视</template>
          <el-menu-item index="2-3">小米</el-menu-item>
          <el-menu-item index="2-4">创维</el-menu-item>
        </el-menu-item-group>
      </el-submenu>
      <el-menu-item index="3">关于</el-menu-item>
    </el-menu>

    <el-breadcrumb separator="/">
      <el-breadcrumb-item v-for="(item, index) in breadcrumb" :key="index">
        {{ item }}
      </el-breadcrumb-item>
    </el-breadcrumb>
  </div>
</template>

<script>
export default {
  data() {
    return {
      activeIndex: '1',
      breadcrumb: ['首页'],
    };
  },
  methods: {
    handleSelect(index) {
      this.activeIndex = index;

      switch (index) {
        case '1':
          this.breadcrumb = ['首页'];
          break;
        case '2-1':
          this.breadcrumb = ['产品', '手机', 'iPhone'];
          break;
        case '2-2':
          this.breadcrumb = ['产品', '手机', '华为'];
          break;
        case '2-3':
          this.breadcrumb = ['产品', '电视', '小米'];
          break;
        case '2-4':
          this.breadcrumb = ['产品', '电视', '创维'];
          break;
        case '3':
          this.breadcrumb = ['关于'];
          break;
      }
    },
  },
};
</script>

<template>
  <div>
    <navigation></navigation>
    <router-view></router-view>
  </div>
</template>

<script>
import Navigation from '@/components/Navigation.vue';
export default {
  components: {
    Navigation,
  },
};
</script>