webpack.config.js

/**
 * Adapted from angular2-webpack-starter
 */

const helpers = require('./config/helpers'),
    webpack = require('webpack');

/**
 * Webpack Plugins
 */
const ProvidePlugin = require('webpack/lib/ProvidePlugin');
const DefinePlugin = require('webpack/lib/DefinePlugin');
const LoaderOptionsPlugin = require('webpack/lib/LoaderOptionsPlugin');

const BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;

const ANALYZE = process.env.ANALYZE || false;
const OPTIONAL_PLUGINS = configureOptionalPlugins();

module.exports = {
    resolve: {
        extensions: ['.ts', '.js']
    },

    entry: helpers.root('index.ts'),

    output: {
        path: helpers.root('bundles'),
        publicPath: '/',
        filename: 'index.umd.js',
        libraryTarget: 'umd',
        library: 'ng2-slim-loading-bar'
    },

    // require those dependencies but don't bundle them
    externals: [/^\@angular\//, /^rxjs\//],

    module: {
        rules: [{
            enforce: 'pre',
            test: /\.ts$/,
            loader: 'tslint-loader',
            exclude: [helpers.root('node_modules')]
        }, {
            test: /\.ts$/,
            loader: 'awesome-typescript-loader?declaration=false',
            exclude: [/\.e2e\.ts$/]
        }]
    },

    plugins: [
        // fix the warning in ./~/@angular/core/src/linker/system_js_ng_module_factory_loader.js
        new webpack.ContextReplacementPlugin(
            /angular(\\|\/)core(\\|\/)(esm(\\|\/)src|src)(\\|\/)linker/,
            helpers.root('./src')
        ),

        new webpack.LoaderOptionsPlugin({
            options: {
                tslintLoader: {
                    emitErrors: false,
                    failOnHint: false
                }
            }
        }),

        ...OPTIONAL_PLUGINS
    ]
};

function configureOptionalPlugins() {
    let plugins = [];
  
    if (ANALYZE) {
      // Include the BundleAnalyzerPlugin for analisys
        plugins.push(new BundleAnalyzerPlugin());
    }
  
    return plugins;
  }