vue3.0，useRoute, useRouter在setup中报undefined | 延时获取问题

vue3.0，获取路由参数会有延时问题，时好时坏；useRoute-issues

<!-- App.vue -- >
<template>
    <router-view />
</template>

<script>
import { onMounted } from 'vue'
import { useRoute } from 'vue-router'

export default {
  name: "App",
  setup() {
    const route = useRoute()
    onMounted(() => {
      console.log(1, route.name) // undefined
      setTimeout(() => console.log(2, route.name), 1000) // 'Home'!
    })
  },
};
</script>

官方解释：

解决方案：main.js || main.ts 添加如下

import { createApp } from 'vue'

import App from './App.vue'
import router from './router'
import store from './store'

const vueApp = createApp(App)
vueApp.use(store).use(router).use(Toast)

router.isReady().then(() => vueApp.mount('#app'))