The CSS preprocessor

CSS on its own can be fun, but stylesheets are getting larger, more complex, and harder to maintain. This is where a preprocessor can help. Sass lets you use features that don't exist in CSS yet like variables, nesting, mixins, inheritance and other nifty goodies that make writing CSS fun again.

1. Clone or download repository
2. npm install
3. gulp
4. update .scss file, the gulp watcher will be convert your .scss to .css

1. What is css preprocessor?
2. Comment in sass
3. Variable
4. Nesting / Nesting property
5. Referencing Parent selector:&
6. Mixins / Mixins with default value
7. Partials
8. @Import
9. Operation (+-*/ and variable does operation)
10. Inheritance (@extend)
11. Interpolation #{...}
12. Variable default with !default
13. Sass output style https://web-design-weekly.com/2014/06/15/different-sass-output-styles/
14. Control directives & Expression @if @elseif @else @for @each @while

http://sass-lang.com/documentation/Sass/Script/Functions.html