myapp/node_modules/optimize-css-assets-webpack-plugin/test/cases/duplicate-css-exists-without-plugin/webpack.config.js

import ExtractTextPlugin from "extract-text-webpack-plugin";
import OptimizeCssAssetsPlugin from "../../../src/";

module.exports = {
  entry: "./index",
  module: {
    rules: [
      {
        test: /\.css$/,
        use: ExtractTextPlugin.extract({
          fallback: { loader: "style-loader" },
          use: {
            loader: "css-loader"
          }
        })
      }
    ]
  },
  plugins: [new ExtractTextPlugin("file.css")]
};