PostCSS Partial Process PostCSS plugin that runs other plugins on parts of a CSS file delimited by comments. Installation npm install postcss-partial-process Usage postcss([ require('postcss-partial-process')({ startComment: 'postcss-partial-process start', // default endComment: 'postcss-partial-process end', // default removeComments: 'auto', // default, means the comments are removed unless they are important (e.g. /*! like this */); also accepts `true` or `false` plugins = [ require('some postcss plugin'), // this plugin will only run between the comments "postcss-partial-process start" and "postcss-partial-process end" ], }),]) See PostCSS docs for examples for your environment.