在Angular 2项目中使用PureMVC框架

一直在尝试将PureMVC框架集成到Angular 2项目中。 我已经成功地构建并提供了应用程序，但浏览器对此表示不满

import Facade = puremvc.Facade;
import IFacade = puremvc.IFacade;
export class ApplicationFacade extends Facade implements IFacade {
[...]

上面的代码段编译得很好，但加载页面时出现以下错误：

application-facade.ts:1 Uncaught ReferenceError: puremvc is not defined
at Object.../../../../../src/app/mvc/application-facade.ts (application-facade.ts:1)
at __webpack_require__ (bootstrap 1e92bec3fa62ce2032c3:54)
at Object.../../../../../src/app/app.component.ts (app-routing.module.ts:20)
at __webpack_require__ (bootstrap 1e92bec3fa62ce2032c3:54)
at Object.../../../../../src/$$_gendir/app/app.module.ngfactory.ts (app.component.ngfactory.ts:34)
at __webpack_require__ (bootstrap 1e92bec3fa62ce2032c3:54)
at Object.../../../../../src/main.ts (environment.ts:8)
at __webpack_require__ (bootstrap 1e92bec3fa62ce2032c3:54)
at Object.0 (main.bundle.js:34749)
at __webpack_require__ (bootstrap 1e92bec3fa62ce2032c3:54)

有没有人有这方面的经验