webpack.config.js

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

module.exports = {
  entry: "./src/main",
  output: {
    path: path.resolve(__dirname, "dist"),
    filename: "app.bundle.js"
  },
  module: {
    rules: [
      {
        test: /\.scss$/,
        use: ExtractTextPlugin.extract({
          use: [
            {
              loader: "css-loader"
            },
            {
              loader: "sass-loader"
            }
          ],
          fallback: "style-loader"
        })
      },
      {
        test: /\.(gif|png|jpe?g|svg)$/i,
        use: [
          "file-loader",
          {
            loader: "image-webpack-loader",
            options: {
              bypassOnDebug: true
            }
          }
        ]
      },
      {
        test: /.ts$/,
        use: [{ loader: "ts-loader" }]
      }
    ]
  },
  plugins: [new ExtractTextPlugin("bundle.css")],
  resolve: {
    extensions: [".ts", ".js"]
  }
};