Compare CSS Preprocessors

Vanilla CSS
LESS
SASS
PostCSS - CSSNext

Installing postcss

npm install -g postcss

Transpiling .pcss to .css

postcss style.pcss [--use library] -o style.css

for our example, we're using CSSNext

installing npm install -g postcss-cssnext

Transpiling .pcss to .css

postcss style.pcss --use postcss-cssnext -o style.css