Add sass and autoprefixer to gulp in visual studio 2015

In Visual studio 2015 (Update 2) a new ASP.NET Core Web Application contains a gulpfile that adds css and js minification. Here is how to add scss and autoprefixing support to that gulpfile.

After adding a new project rename site.css to site.scss

Next install the the required npm packages:

npm install autoprefixer npm install gulp-sass You need to ensure you run these commands from the project folder (not just anywhere) eg for me that means

 D:\aaa_development\spikes\GulpSpike\src\GulpSpike