vue3在router中使用store报错解决方案

就是需要在实例化一下，因为在编译router的时候pinia还未被实例化。

import { mainStore, useStore } from "@/store";
import { createApp } from 'vue'
import App from '../../App.vue'
import { createPinia } from "pinia";

const pinia = createPinia()
const app = createApp(App)
app.use(pinia)

const store = mainStore();
console.log('zxc', store.msg)