Failed at the node-sass@4.13.1 postinstall script. npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

看的第一遍，找不到sass，查看node-sass文件，里面没有文件

解决办法

下载sass之前，要先修改源

先把node-modules删除掉

执行以下命令

npm config set sass_binary_site=https://npm.taobao.org/mirrors/node-sass

再 npm install