//按需引用
import { Button } from ‘vant‘
import ‘vant/lib/button/style‘  //引入样式或者下载 vant.min.css，在根目录index.html引用
Vue.use(Button)


//全部引用
import vant from ‘vant‘
Vue.use(vant )

<van-button type="default">默认按钮</van-button>
<van-button type="primary">主要按钮</van-button>
<van-button type="info">信息按钮</van-button>
<van-button type="warning">警告按钮</van-button>