Function postcss

packages/postcss/index.js:17–42

* @param {object} [options] https://github.com/postcss/postcss-loader#options * @param {string} [options.parser] Package name of custom PostCSS parser to use. * @param {string} [options.stringifier] Package name of custom PostCSS stringifier to use

(options = {})

 * @return {Function}
 */
function postcss(options = {}) {
  if (Array.isArray(options)) {
    throw Error(
      'Passing PostCSS plugins as a first argument is not supported anymore, use options.plugins instead'
    )
  }

  return (context, util) => prevConfig => {
    const ruleDef = Object.assign(
      {
        test: /\.css$/,
        use: [
          {
            loader: 'postcss-loader',
            options
          }
        ]
      },
      context.match
    )

    let nextConfig = util.addLoader(ruleDef)(prevConfig)

    return nextConfig
  }
}