webpack.config.js

/* eslint-env node */

const path = require('path');
const webpackMerge = require('webpack-merge');

const commonConfig = {
    devtool: 'cheap-eval-source-map',
    entry: './src/mdl-dialog-service.js',
    output: {
        path: path.resolve(__dirname, 'dist'),
        filename: 'mdl-dialog-service.js',
        library: 'mdlDialogService',
        libraryTarget: 'umd',
        umdNamedDefine: true
    },
    externals: {
        'dialog-polyfill': true,
        'aurelia-framework': true
    },
    module: {
        rules: [
            {
                enforce: 'pre',
                test: /\.js$/,
                exclude: /node_modules/,
                loader: 'eslint-loader',
                options: {
                    emitWarning: true
                }
            },
            {
                test: /\.js$/,
                exclude: /node_modules/,
                loader: 'babel-loader',
                options: {
                    presets: [
                        ['es2015', {
                            loose: true,
                            module: false
                        }]
                    ]
                }
            }]
    },
};

const devConfig = {};

const prodConfig = {
    devtool: 'source-map'
};

module.exports = function (environment) {
    let finalConfig = {};
    switch (environment) {
        case 'prod':
        case 'production':
            finalConfig = webpackMerge(commonConfig, prodConfig);
            finalConfig.module.rules[0].options = {
                failOnWarning: true,
                failOnError: true
            };
            break;
        case 'test':
        case 'testing':
            break;
        case 'dev':
        case 'development':
        default:
            finalConfig = webpackMerge(commonConfig, devConfig);
    }
    return finalConfig;
}