PostCSS topic

PostCSS is a tool for transforming CSS with JavaScript. It can be used to develop a template language such as Sass and LESS. The PostCSS core consists of:

CSS parser that generates an abstract syntax tree
Set of classes that comprises the tree
CSS generator that generates a CSS line for the object tree
Code map generator for the CSS changes made#

There are official tools making it possible to use PostCSS with build systems such as Webpack, Gulp, and Grunt. There is also a console interface available. Browserify or Webpack can be used to open PostCSS in a browser.

The complete plugin list can be found on postcss.parts, with some examples listed below.

Autoprefixer to add and clear browser prefixes.
CSS Modules to get CSS selectors isolated and code organized. It is supplied as part of Webpack.
stylelint to analyze CSS code for mistakes and check style consistency.
stylefmt fixes the CSS code according to the stylelint settings.
PreCSS to perform some Sass/Less preprocessing functions.
postcss-preset-env to emulate features from unfinished CSS specification drafts.
cssnano to make CSS smaller in size by getting rid of the spaces and rewriting the code.
RTLCSS to change CSS code so that the design should be suitable for right-to-left writing (such is applied in Arabic and Hebrew).
postcss-assets, postcss-inline-svg and postcss-sprites to work with graphics.