webpack.config.js

const path = require('path')
const CleanWebpackPlugin = require('clean-webpack-plugin')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const ExtractTextPlugn = require('extract-text-webpack-plugin')
const webpack = require('webpack')

let extractTextPlugn = new ExtractTextPlugn({ filename: 'main.css' })

module.exports = {
  entry: {
    app: './src/app',
  },
  output: {
    filename: '[name].bundle.js',
    path: path.resolve(__dirname, 'dist'),
  },
  resolve: {
    extensions: ['.ts', '.js', '.scss'],
  },
  module: {
    rules: [
      {
        test: /\.ts$/,
        loader: 'ts-loader',
        exclude: /node_modules/,
      },
      {
        test: /\.(sass|scss)$/,
        use: extractTextPlugn.extract({
          fallback: 'style-loader',
          use: ['css-loader', 'sass-loader'],
        }),
      },
    ],
  },
  devtool: 'inline-source-map',
  devServer: {
    contentBase: './dist',
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: 'src/index.html',
    }),
    new CleanWebpackPlugin(['dist']),
    extractTextPlugn,
  ],
}