SubMenu.vue

<template functional>
  <a-sub-menu :key="props.menuInfo.path">
    <span slot="title">
      <a-icon v-if="props.menuInfo.meta.icon" :type="props.menuInfo.meta.icon" />
      <span>{{ props.menuInfo.meta.title }}</span>

    </span>
    <template v-for="item in props.menuInfo.children">
      <a-menu-item v-if="!item.children" :key="item.path" @click="()=>parent.$router.push({ path: item.path, query: parent.$route.query })">
        <a-icon v-if="item.meta.icon" :type="item.meta.icon" />
        <span>{{ item.meta.title }}</span>
      </a-menu-item>
      <sub-menu v-else :key="item.path" :menu-info="item" />
    </template>

  </a-sub-menu>
</template>
<script>
export default {
  props: ['menuInfo']
}
</script>