webpack + react + babel

.babelrc

{
  "presets": ["env", "react"]
}

npm.sh

npm i webpack babel-loader babel-core babel-preset-env babel-preset-react react react-dom prop-types html-webpack-plugin html-loader --save-dev

package.json

"scripts": {
  "build": "webpack"
}

webpack.config.js

const path = require("path");
const HtmlWebPackPlugin = require("html-webpack-plugin");
module.exports = {
  entry: ["./src/js/app.js"],
  output: {
    path: path.resolve(__dirname, "dist"),
    filename: "js/[name].js"
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader"
        }
      },
      {
        test: /\.html$/,
        use: [
          {
            loader: "html-loader"
          }
        ]
      }
    ]
  },
  plugins: [
    new HtmlWebPackPlugin({
      template: "./src/index.html",
      filename: "./index.html"
    })
  ]
};