Webpack cfg I use with babel for react...

webpack.config.js

module.exports = {
    context: __dirname + "/app",
    entry: {
        javascript: ["./app.js"],
        html: ["./index.html", "./style.css"],
    },

    output: {
        filename: "app.js",
        path: __dirname + "/dist",
    },
    module: {
        loaders: [
            {
                test: /\.js$/,
                exclude: [/node_modules/, 'book.js'],
                loaders: ["babel-loader"],
            },
            {
                test: /\.html$/,
                loaders: ["file?name=[name].[ext]"],
            },
            { test: /\.css$/, loaders: ["file?name=[name].[ext]"]}
         ],
    },
}