webpack

const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const webpack = require('webpack');
const Dotenv = require('dotenv-webpack');

module.exports = {
  entry: './src/index.js',
  output: {
    path: path.resolve('dist'),
    filename: '[name].[contenthash].js',
    publicPath: '/'
  },
  devtool: 'source-map',
  resolveLoader: {
    moduleExtensions: ['-loader']
  },
  resolve: {
    extensions: ['.js', '.jsx']
  },
  module: {
    rules: [
      {
        test: [/\.jsx$/, /\.js$/],
        exclude: /node_modules/,
        loader: 'babel-loader',
        query: {
          presets: ['es2015', 'react', 'stage-0', 'stage-2']
        }
      },
      {
        test: /\.html$/,
        exclude: /node_modules/,
        loader: 'html-loader'
      },
      {
        test: /\.(eot|woff|woff2|ttf|svg|png|jpg|gif)$/,
        use: [
          {
            loader: 'file-loader'
          }
        ]
      },
      {
        test: /\.css$/,
        exclude: /node_modules/,
        use: ['style-loader', 'css-loader']
      },
      {
        test: /\.scss$/,
        use: [
          {
            loader: 'style-loader'
          },
          {
            loader: 'css-loader',
            options: {
              sourceMap: true
            }
          },
          {
            loader: 'sass-loader',
            options: {
              sourceMap: true
            }
          }
        ]
      },
      {
        test: /\.s?[ac]ss$/,
        use: [
          MiniCssExtractPlugin.loader,
          { loader: 'css-loader', options: { url: false, sourceMap: true } },
          { loader: 'sass-loader', options: { sourceMap: true } }
        ]
      }
    ]
  },
  devServer: {
    historyApiFallback: true,
    port: 8000
  },
  optimization: {
    splitChunks: {
      cacheGroups: {
        commons: {
          test: /[\\/]node_modules[\\/]/,
          name: 'vendor',
          chunks: 'all'
        }
      }
    }
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: './public/index.html',
      filename: 'index.html'
    }),
    new MiniCssExtractPlugin({
      filename: 'style.css'
    }),
    new Dotenv({
      path: './.env' // Path to .env file (this is the default)
    }),
    new webpack.DefinePlugin({
      'process.env.BROWSER': true,
      'process.env.URL_API': JSON.stringify(process.env.URL_API)
    })
  ]
};