extract-text-middleware.js

const ExtractTextPlugin = require('extract-text-webpack-plugin');

module.exports = (neutrino, options) => {
  // Supports neutrino-preset-web and any other preset following this pattern.
  const styleRule = neutrino.config.module.rule('style');
  const styleTest = styleRule.get('test');
  const styleFallback = styleRule && styleRule.use('style');
  const styleLoaders = styleRule && styleRule.uses.store.keys()
    .filter((key) => key !== 'style')
    .map((key) => stylerule.use(key))
    .map((use) => ({loader: use.loader, options: use.options}));

  const loaders = ExtractTextPlugin.extract({
    fallback: options.fallback || styleFallback|| 'style-loader',
    use: options.use || styleLoaders || 'css-loader',
  });

  loaders.forEach((loader, options) => console.log([loader, options]));

  neutrino.config.plugin('extract')
    .use(ExtractTextPlugin, [options.filename || '[name].css']);
};