stylelint/src/utils/rawNodeString.js

Modern CSS linter

/**
 * Stringify PostCSS node including its raw "before" string.
 *
 * @param {Node} node - Any PostCSS node
 * @return {string}
 */
export default function (node) {
  let result = ""
  if (node.raw("before")) {
    result += node.raw("before")
  }
  result += node.toString()
  return result
}