1,设置为淘宝镜像(http://npm.taobao.org):
$ npm config set registry https://registry.npm.taobao.org
2,安装 提示插件 toastr(http://npm.taobao.org/package/toastr,https://github.com/CodeSeven/toastr,https://www.cnblogs.com/xyz1220/p/7350408.html):
$ npm install --save toastr
3,