webpack.config.js

const webpack = require('webpack')
const HtmlWebpackPlugin = require('html-webpack-plugin')
const path = require('path')
module.exports = env => {
  return {
    mode: env.NODE_ENV,
    module: {
      rules: [
        {
          test: /\.jsx?$/,
          exclude: /(node_modules)/,
          enforce: 'pre',
          loader: 'eslint-loader',
          options: {
            configFile: '.eslintrc'
          }
        },
        {
          test: /\.js$/,
          exclude: /node_modules/,
          use: {
            loader: "babel-loader"
          }
        },
        {
          test: /(\.css|\.scss|\.sass)$/,
          use: [
            'style-loader',
            {
              loader: 'css-loader',
              options: {
                sourceMap: true
              }
            }, {
              loader: 'postcss-loader',
              options: {
                plugins: () => [
                  require('autoprefixer')
                ],
                sourceMap: true
              }
            },
            {
            loader: 'sass-loader',
            options: {
              includePaths: [path.resolve(__dirname, 'src', 'scss')]
            }
}
          ]
        },
        {
        test: /\.eot(\?v=\d+.\d+.\d+)?$/,
        use: ['file-loader']
      },
      {
        test: /\.woff(2)?(\?v=[0-9]\.[0-9]\.[0-9])?$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 10000,
              mimetype: 'application/font-woff'
            }
          }
        ]
      },
      {
        test: /\.[ot]tf(\?v=\d+.\d+.\d+)?$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 10000,
              mimetype: 'application/octet-stream'
            }
          }
        ]
      },
      {
        test: /\.svg(\?v=\d+\.\d+\.\d+)?$/,
        use: [
          {
            loader: 'url-loader',
            options: {
              limit: 10000,
              mimetype: 'image/svg+xml'
            }
          }
        ]
      },
      {
        test: /\.(jpe?g|png|gif|ico)$/i,
        use: [
          {
            loader: 'file-loader',
            options: {
              name: '[name].[ext]'
            }
          }
        ]
      }
      ]
    },
    devServer: {
      contentBase: path.join(__dirname, 'dist'),
      compress: true,
      port: 9000
    },
    plugins: [
      new HtmlWebpackPlugin({
        template: './src/index.ejs'
      }),
      new webpack.DefinePlugin({
        'process.env.NODE_ENV': JSON.stringify(env.NODE_ENV || 'development'),
        'process.env.API_URL': JSON.stringify(env.API_URL || 'http://localhost:8000/'),
      })
    ]
  }
}