preliminary/src/App.vue

<template>
    <div id="app">
        <router-view/>
        <portal-target name="notification-outlet"></portal-target>
        <portal-target name="notification-detail"></portal-target>
        <portal-target name="notification-search"></portal-target>
    </div>
</template>
<script>
  export default {
    name:'App'
  }
</script>
<style lang="less">
  @import "./less/index.less";
</style>