uniapp如何引入vant ui组件？

1、新建一个uniapp项目，选择Vue2，不勾选unilcloud

2、右键项目名，选择菜单在命令行打开

3、输入 npm i vant@latest-v2

4、main.js改成这样

import App from './App'

// #ifndef VUE3
import Vue from 'vue'
import Vant from "vant";
import 'vant/lib/index.less'
Vue.use(Vant)
import './uni.promisify.adaptor'
Vue.config.productionTip = false
App.mpType = 'app'
const app = new Vue({
  ...App
})
app.$mount()
// #endif

// #ifdef VUE3
import { createSSRApp } from 'vue'
export function createApp() {
  const app = createSSRApp(App)
  return {
    app
  }
}
// #endif

chainWebpack:(config) => {
    config.module 
      .rule("mjs$")
      .test(/\.mjs$/)
      .include.add(/node_modules/)
      .end()
      .type("javascript/auto");
  }

<template>

	<view class="content">

		<van-swipe class="my-swipe" :autoplay="3000" indicator-color="white">
			<van-swipe-item>1</van-swipe-item>
			<van-swipe-item>2</van-swipe-item>
			<van-swipe-item>3</van-swipe-item>
			<van-swipe-item>4</van-swipe-item>
		</van-swipe>
		<van-grid>
			<van-grid-item icon="photo-o" text="文字" />
			<van-grid-item icon="setting-o" text="文字" />
			<van-grid-item icon="home-o" text="文字" />
			<van-grid-item icon="video-o" text="文字" />
			<van-grid-item icon="photo-o" text="文字" />
			<van-grid-item icon="setting-o" text="文字" />
			<van-grid-item icon="home-o" text="文字" />
			<van-grid-item icon="video-o" text="文字" />
		</van-grid>

		<van-card num="2" price="2.00" desc="描述信息" title="商品标题"
			thumb="https://repo.bfw.wiki/bfwrepo/image/5ff8f9d574eb5.png" />
		<van-card
		  num="2"
		  price="...

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