Error: ENOENT: no such file or directory, scandir '/node_modules/node-sass/vendor'**
解决方法:
先安装完node-sass
看看行不行, 不行的话, 执行:
npm rebuild node-sass
不行的, 运行:
npm update
npm install
node node_modules/node-sass/scripts/install.js
npm rebuild node-sass
npm rebuild gulp-sass