React/TypeScript/SASS coding guidelines - from blueprint UI library

React/TypeScript/SASS coding guidelines

- from the blueprint UI library

https://github.com/palantir/blueprint/wiki/Coding-guidelines

ref - blueprint:

http://blueprintjs.com/

ref Concentric CSS:
 organising CSS in 'visual' terms (the CSS box model):
http://rhodesmill.org/brandon/2011/concentric-css/

ref Mozilla.org CSS coding techniques:
https://hacks.mozilla.org/2016/05/css-coding-techniques/

general API guidelines (from Swift language):
https://swift.org/documentation/api-design-guidelines/