// parse.js const fs = require('fs') const util = require('util') const postcss = require('postcss') const css = fs.readFileSync('./input.css') const ast = postcss.parse(css) console.log(util.inspect(ast, false, null)) $ node parse.js Root { raws: { semicolon: false, after: '\n' }, type: 'root', nodes: [ Rule { raws: { before: '', between: ' ', semicolon: true, after: '\n' }, type: 'rule', nodes: