const path = require('path')
const HtmlWebpackPlugin = require('html-webpack-plugin')

module.exports = (env) => {
  return {
    entry: './src/index.js',
    output: {
      path: path.resolve(__dirname, 'dist'),
      filename: 'app.js'
    },
    module: {
      rules: [
        {
          test: /\.js$/,
          exclude: /(node_modules)/,
          use: {
            loader: 'babel-loader',
            options: {
              presets: ['@babel/preset-env']
            }
          }
        }
      ]
    },
    devtool: env.mode === 'development' ? 'inline-source-map' : '',
    plugins: [
      new HtmlWebpackPlugin({ template: 'index.html' })
    ]
  }
}