通过 npm+Vant Weapp 构建微信小程序

npm install -g cnpm --registry=https://registry.npm.taobao.org
cnpm -v 

cnpm init 没有特殊需求，一路回车下去

cnpm i @vant/weapp -S --production

  "usingComponents": {    "van-button": "@vant/weapp/button/index"  }