Webpack：将 css 提取到自己的包中

var config = {
  entry: {
    'admin': APP_DIR + '/admin.entry.jsx',
    'public': APP_DIR + '/public.entry.jsx'
  },
  output: {
    path: BUILD_DIR,
    filename: '[name].bundle.js'
  },
  resolve: {
    extensions: ['.js', '.jsx', '.json']
  },
  plugins: [],
  devtool: 'cheap-source-map',
  module: {
    loaders: [{
        test: /(\\/index)?\\.jsx?/,
        include: APP_DIR,
        loader: 'babel-loader'
      },
      {
        test: /\\.scss$/,
        loaders: [
          'style-loader',
          'css-loader',
          'sass-loader',
          {
            loader: 'sass-resources-loader',
            options: {
              resources: ['./src/styles/constants.scss']
            },
          }
        ]
      }
    ],
  }
};

{
 "presets" : ["es2015","react"],
 "plugins": ["transform-decorators-legacy","babel-plugin-root-import"]
}

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

module.exports = {
  module: {
    rules: [
      {
        test: /\\.scss$/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          //resolve-url-loader may be chained before sass-loader if necessary
          use: ['css-loader', 'sass-loader']
        })
      }
    ]
  },
  plugins: [
    new ExtractTextPlugin('style.css')
    //if you want to pass in options, you can do so:
    //new ExtractTextPlugin({
    //  filename: 'style.css'
    //})
  ]
}