[TOC] [Angular 2 OpaqueToken & InjectionToken](https://segmentfault.com/a/1190000008626348) # 文章参考 https://www.concretepage.com/angular/ [Ionic 2 开发大全](https://segmentfault.com/a/1190000008688757) https://jsonplaceholder.typicode.com/ http://smashfind.com/ http://orizens.com/wp/ http://onehungrymind.com https://www.jianshu.com/u/4f189e9f909c [Promise 对比 Observable](https://www.jianshu.com/p/e317e1bb3faf) [Rangle's Angular 2 Training Book](https://zhangchen915.gitbooks.io/angular2-training/content/license.html)