webpack.config.js

var path = require('path');
var webpack = require('webpack');
var env = require('yargs').argv.mode;

var UglifyJsPlugin = webpack.optimize.UglifyJsPlugin;

var plugins = [];
var outputFile;

if (env === 'build') {
    plugins = [new UglifyJsPlugin({ minimize: true })];
    outputFile = 'ibtree.min.js';
} else {
    outputFile = 'ibtree.js';
}

module.exports = {
    entry: './src/index.js',
    devtool: 'source-map',
    output: {
        path: path.resolve('./dist'),
        filename: outputFile,
        library: 'ibtree',
        libraryTarget: 'umd',
        umdNamedDefine: true,
    },
    resolve: {
        root: path.resolve('./src'),
        extensions: ['', '.js'],
    },
    module: {
        loaders: [
            {
                test: /\.js$/,
                loader: 'babel',
                exclude: /node_modules/,
            },
        ],
    },
    plugins: plugins,
};