webpack.config.js

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

module.exports = {
  entry: {
    js: __dirname + "/example/index.js",
  },
  output: {
    path: __dirname + "/example/output/",
    filename: "index.js"
  },
  resolveLoader: {
    alias: {
      "vars": "sass-values-loader"
    },
    modules: ["node_modules", "./"],
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: [/node_modules/],
        use: {
          loader: 'babel-loader',
        },
      },
      {
        test: /\.scss$/,
        use: ExtractTextPlugin.extract({
          fallback: 'style-loader',
          use: [
            'css-loader?importLoaders=1&modules&localIdentName=[path]___[name]__[local]___[hash:base64:5]',
            "sass-loader"
          ]
        }),
      }
    ],
  },
  plugins: [
      new ExtractTextPlugin("style.css"),
      new WebpackCleanupPlugin()
  ]
}