vue3_YDHL/main.js

import App from './App'
// 引入 Vant 组件
import { ActionSheet, Cell, Search } from 'vant'
// 引入 Vant 样式
import 'vant/lib/index.css'

// #ifndef VUE3
import Vue from 'vue'
import './uni.promisify.adaptor'
Vue.config.productionTip = false
App.mpType = 'app'
// Vue2 环境下注册 Vant 组件
Vue.use(ActionSheet)
Vue.use(Cell)
const app = new Vue({
  ...App
})
app.$mount()
// #endif

// #ifdef VUE3
import { createSSRApp } from 'vue'
export function createApp() {
  const app = createSSRApp(App)
  // Vue3 环境下注册 Vant 组件
  app.use(ActionSheet)
  app.use(Cell)
  app.use(Search)
  return {
    app
  }
}
// #endif