记录自己学习中，出现的错误

在搭建vue3项目，配置router，vuex,element-ui后，运行项目页面白屏，控制台出现了Cannot read property 'nextSibling' of null的错误

 查看main.ts 文件，此时的写法是：

import { createApp } from 'vue'
import './style.css'
import App from './App.vue'
import store from './store/index'
import ElementPlus from 'element-plus'
import 'element-plus/dist/index.css'
import router from './router/index'


createApp(App).use(router).mount('#app')
createApp(App).mount('#app')
createApp(App).use(store).mount('#app')
createApp(App).use(ElementPlus).mount('#app')

将main.ts 文件修改为：

import { createApp } from 'vue'
import './style.css'
import App from './App.vue'
import store from './store/index'
import ElementPlus from 'element-plus'
import 'element-plus/dist/index.css'
import router from './router/index'

const app = createApp(App)
app.use(store),
    app.use(router),
    app.use(ElementPlus),
    app.mount('#app')

即可解决问题，运行成功