英文:
I have a problem with finding the app instance in Nuxt 3
问题
我是新手使用nuxtjs，我想将我的现有Web应用迁移到Nuxt3，但我在查找应用程序实例方面遇到了问题，通常在Vue3中，我使用以下方法创建应用程序实例：
import App from "./App.vue";
const app = createApp(App);
然后在应用程序的其他部分中使用应用程序实例，例如：
import { app } from '../main';
const email = app.config.globalProperties.email;
我如何在nuxt3中获取应用程序实例？
我已尝试不同的方法，如this.$nuxt.app和Vue.use()，但都没有成功。
英文:
I'm new to nuxtjs, and I want to migrate my existing web application into Nuxt3 but I have an issue with finding the app instance, usually in Vue3 I use this approach to create an app instance
import App from "./App.vue";
const app = createApp(App);
and then use the app instance in other parts of the application, like:
import { app } from '../main';
const email = app.config.globalProperties.email;
how can I get the app instance in nuxt3 ?
I have tried different approaches such as this.$nuxt.app Vue.use() but non of them worked.
答案1
得分: 1
以下是翻译好的部分：
这并不是很容易理解您要执行此操作的具体上下文。然而，您可能想要执行以下操作：
// 无需导入，nuxt会处理基本导入...
const app = useNuxtApp().vueApp
// 或者...像现代js/ts一样使用对象解构
const { vueApp } = useNuxtApp()
在大多数情况下，这应该有效：https://nuxt.com/docs/api/composables/use-nuxt-app#methods。
然而，请注意，在大多数传统上需要在经典Vue 2应用程序中使用它的用例中，不应该在Nuxt 3应用程序中使用它，因为通常有更好的方法来执行相同的操作。
英文:
It is not very easy to understand the specific context where you want to do this.
However, you probably want to do:
// No imports are neeeded, nuxt takes care of base imports...
const app = useNuxtApp().vueApp
// or... using object detstructuring like it's modern js/ts
const { vueApp } = useNuxtApp()
which should work in most cases: https://nuxt.com/docs/api/composables/use-nuxt-app#methods.
However, please, be aware that for most use cases where you traditionally need to use it in a classic Vue 2 app, you should not use it in a Nuxt 3 app, as there are usually better ways to do the same thing.
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