css-tree/lib/syntax/config/lexer.js

A tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and matching) based on specs and browser implementations

import definitions from '../../data.js';
import * as node from '../node/index.js';

export default {
    generic: true,
    ...definitions,
    node
};