Awesome

Learning PostCSS

Just one of the things I'm learning. https://github.com/hchiam/learning

You can make CSS run fast for users, while also letting yourself write modern CSS, all without having to think about (but still shipping) things like compatibility for browser vendor prefixes and support for older browsers. PostCSS does both post-processing and pre-processing of CSS, all customizable with your choice of plugins (in postcss.config.js). The difference with things like SASS, is that PostCSS plugins let you choose which features you want, e.g. adding partials and nesting but with the choice of not having SASS loops enabled, etc.

https://www.youtube.com/watch?v=WhCXiEwdU1A

https://postcss.org

https://github.com/postcss/postcss#usage

https://www.sitepoint.com/an-introduction-to-postcss

Use the --no-map option for production-deployment-ready CSS.

Use the --watch option to auto-build upon change. (Ctrl+C or Cmd+C to stop the running CLI command.)

From scratch

Using yarn:

yarn --dev add postcss postcss-cli autoprefixer postcss-nested postcss-mixins postcss-preset-env cssnano

Or with npm:

npm --save-dev install postcss postcss-cli autoprefixer postcss-nested postcss-mixins postcss-preset-env cssnano

And then:

touch postcss.config.js input.css
postcss input.css -o output.css

Starting by testing out this repo

Using yarn: (triple-click to select all)

git clone https://github.com/hchiam/learning-postcss.git && cd learning-postcss && yarn;
# and then
yarn build
# input.css --> output.css

Or with npm: (triple-click to select all)

git clone https://github.com/hchiam/learning-postcss.git && cd learning-postcss && npm install;
# and then
npm run build
# input.css --> output.css

I would NOT recommend the postcss-coglang-stylesheets dev dep for real projects - it's just an example of a custom PostCSS plugin.

Fun

You can write your own PostCSS plugin:

For example, to let you write CSS in a language other than English, and have PostCSS transform it into runnable CSS: https://github.com/ismamz/postcss-spanish-stylesheets

Follow the instructions in the official boilerplate: https://github.com/postcss/postcss-plugin-boilerplate/

Example: https://github.com/hchiam/postcss-coglang-stylesheets