webpack.config.js

module.exports = {
    entry: "./src/main.js",
    output: {
        filename: "./dist/bundle.js"
    },
    module: {

        loaders: [{
            test: [/\.js$/, /\.es6$/],
            exclude: /node_modules/,
            loader: 'babel-loader',
            query: {
                presets: ['react', 'es2015']
            }
        }]
    },
    resolve: {
        extensions: ['.js', '.es6']
    }
};