webpack.config.js

/* global __dirname, require, module*/
const webpack = require('webpack');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const path = require('path');
const env = require('yargs').argv.env; // use --env with webpack 2

let libraryName = 'roy-ast';

let plugins = [],
    outputFile;

if (env === 'build') {
    plugins.push(new UglifyJsPlugin());
    outputFile = libraryName + '.min.js';
} else {
    outputFile = libraryName + '.js';
}

const config = {
    entry: __dirname + '/src/index.js',
    devtool: 'source-map',
    output: {
        path: __dirname + '/dist',
        filename: outputFile,
        library: libraryName,
        libraryTarget: 'umd',
        umdNamedDefine: true
    },
    module: {
        rules: [{
            test: /(\.jsx|\.js)$/,
            loader: 'babel-loader',
            exclude: /(node_modules|bower_components)/
        },
        {
            test: /(\.jsx|\.js)$/,
            loader: 'eslint-loader',
            exclude: /node_modules/
        }
        ]
    },
    resolve: {
        modules: [path.resolve('./node_modules'), path.resolve('./src')],
        extensions: ['.json', '.js', '.jsx']
    },
    plugins: plugins,
    externals: {
        react: 'react',
        'react-dom' : 'react-dom',
        'prop-types': 'prop-types'
    }
};

module.exports = config;