Bundaling ES class with static field lead to [Error: Line 5: Unexpected token =]

[luboid]

Hi,
I'm using
gulp-requirejs:1.4.0
which uses :
requirejs: ^2.3.6
Here is JS code that produces [Error: Line 5: Unexpected token =]
It runs perfectly fine in a browser

define(['$prcbPlugins', 'js/trnsl'], function ($, trnsl) {
	var actionHandlerUrl = '/api/external-notifications';

	class DAL {
		static contentReport = class ContentReport {
			static get(parameters) {
				return $.prcbExecute({
					url: actionHandlerUrl + '/contentreport',
					data: parameters,
					method: 'get'
				}).asPromise();
			}
		};

		static services = class Services {
			static all() {
				return $.prcbExecute({
					url: actionHandlerUrl + '/services',
					method: 'get'
				}).asPromise();
			}
			static get(id) {
				return $.prcbExecute({
					url: actionHandlerUrl + '/services/:id',
					data: { id: id },
					method: 'get'
				}).asPromise();
			}
		};

		static eventTypes = class EventTypes {
			static all() {
				return $.prcbExecute({
					url: actionHandlerUrl + '/eventtypes',
					method: 'get'
				}).asPromise();
			}
			static get(id) {
				return $.prcbExecute({
					url: actionHandlerUrl + '/eventtypes/:id',
					data: { id: id },
					method: 'get'
				}).asPromise();
			}
		};

		static channels = class Channels {
			static all() {
				return new Promise((resolve) => {
					let channels = [
						{ id: 0, title: 'SMS' },
						{ id: 1, title: 'EMail' }
					];
					resolve(channels);
				});
			}

			static providers() {
				return new Promise((resolve) => {
					let channels = [
						{ id: 0, title: 'ProCredit' },
						{ id: 1, title: 'Teracom' },
						{ id: 2, title: 'Mobica' },
					];
					resolve(channels);
				});
			}

			static enum = class Enum {
				static SMS = 0;
				static Email = 1;
			}
		}

		static statuses = class Statuses {
			static all() {
				return new Promise((resolve) => {
					let statuses = [
						{ id: 0, title: trnsl.gettext('за формиране') },
						{ id: 1, title: trnsl.gettext('формиран') },
						{ id: 2, title: trnsl.gettext('завършена комуникация') },
						{ id: 3, title: trnsl.gettext('липсващ или невалиден темплейт') },
						{ id: 4, title: trnsl.gettext('грешка при комуникация') },
						{ id: 5, title: trnsl.gettext('твърде много грешки') },
					];
					resolve(statuses);
				});
			}
		}

		static utils = class Utils {
			static toHash(array, id, descr) {
				if (id === undefined) {
					id = 'id';
				}
				if (descr === undefined) {
					descr = 'title';
				}

				let o = {};
				array.forEach(i => o[i[id]] = i[descr]);

				return o;
            }
        }
	}

	return DAL;
})

Here is config

module.exports = ({
    baseUrl: "../",
    mainConfigFile: 'default.js', //???
    paths: {
        'services': '../../scripts/services',
        'toastr': 'empty:',
        'resources': '../../scripts/jq/requirejs.plugins/resources',
        '$plugins': '../../scripts/jq/plugins',
        'jquery': 'empty:',
        '$prcbPlugins': 'empty:',
        'knockout': 'empty:',
        'knockout.prcb': 'empty:',
        'durandal/activator': 'empty:',
        'durandal/app': 'empty:',
        'durandal/binder': 'empty:',
        'durandal/composition': 'empty:',
        'durandal/events': 'empty:',
        'durandal/history': 'empty:',
        'durandal/http': 'empty:',
        'durandal/observable': 'empty:',
        'durandal/serializer': 'empty:',
        'plugins/widget': 'empty:',
        'durandal/system': 'empty:',
        'durandal/entrance': 'empty:',
        'durandal/viewEngine': 'empty:',
        'durandal/viewLocator': 'empty:',
        'plugins/dialog': 'empty:',
        'plugins/prcb': 'empty:',
        'plugins/prcbroutes': 'empty:',
        'plugins/prcbmessagelistener': 'empty:',
        'plugins/history': 'empty:',
        'plugins/router': 'empty:',
        'globalize': 'empty:',
        'translations': 'empty:',
        'bctx': 'empty:',
        'underscore': 'empty:',
        '$ui': 'empty:'
    },
    optimize: 'none',
    generateSourceMaps: false,
    preserveLicenseComments: true,
    optimizeCss: "none",
    removeCombined: true,
    name: "js/default",
    exclude: [
        // ако при dependency-тата има някой, който не трябва да бъде включен във файла
		'resources'
    ],
    out: 'app.js',
    wrap: true,
    rawText: {
        'translations': 'define(function () { return {}; });',
        'bctx': 'define(function () { return {}; });'
    }
});

[prantlf]

The parser bundled to r.js is too old. You'll need to upgrade it. See #998.