remark-css-selectors/babel.config.json

Adding class and id attribute to AST tree (not standard markdown syntax)

{
  "presets": [
      ["@babel/env",
        {
        "modules": "commonjs",
        "targets": {
          "node": "10"
        }
      }]
  ],
  "plugins": ["@babel/plugin-transform-modules-commonjs"]
}