App_cros/src/main.js

import { createApp } from 'vue';
import App from './App.vue';
import router from "./router"
// 一:引入i18n
import i18n from "./locales/index.js";
import pinia from './store';

const app = createApp(App);
app.use(router)
app.use(pinia)
app.use(i18n)
app.mount('#app')