npm i vant -S

在main.js中加入

 //引入Vant【安装方法】cnpm i vant -Simport Vant from 'vant';import 'vant/lib/index.css';import 'vant/lib/icon/local.css'; //解决离线无网络环境中使用icon不显示的问题Vue.use(Vant);//引入常用调用组件import { Toast, Loading, Notify } from 'vant';Vue.prototype.$toast = Toast;Vue.prototype.$loading = Loading;Vue.prototype.$notify = Notify;