angular - 在 Angular 2 应用程序中使用接口(interface)和 OpaqueToken 时出现 Typescript 警告

Question

我一直在关注文档 here并使用 ng-cli。

我创建了以下配置文件 (app-config.ts):

import { OpaqueToken } from '@angular/core';

export interface AppConfig {
  supportTelephoneNumber: string;
}

export let APP_CONFIG_t = new OpaqueToken('app.config');

export const APP_CONFIG: AppConfig = {
  supportTelephoneNumber: '1111 111 1111'
};

在我的 app.module.ts 文件中我有:

...
@NgModule({
  declarations: [
    UkCurrencyPipe,
    AppComponent,
    HomeComponent
  ],
  imports: [
    BrowserModule,
    FormsModule,
    HttpModule,
    RouterModule.forRoot(ROUTES, { useHash: true }),
    MaterialModule.forRoot()
  ],
  providers: [
    { provide: APP_CONFIG_t, useValue: APP_CONFIG },
    ...

我在我的 app.component.ts 文件中使用此配置，如下所示:

import { Component, Inject } from '@angular/core';
import { APP_CONFIG_t, AppConfig } from './app-config';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.less']
})
export class AppComponent {
  constructor(@Inject(APP_CONFIG_t) public config: AppConfig) {

  callSupport(): void {
    window.location.href = 'tel:+' + this.config.supportTelephoneNumber;
  }
}

当我使用 ng serve 为我的应用提供服务时，一切似乎都运行良好，但我确实在运行 ng server 的控制台中看到了这些警告:

WARNING in ./src/app/app.component.ts
40:166 export 'AppConfig' was not found in './app-config'

WARNING in ./src/app/app.component.ts
40:195 export 'AppConfig' was not found in './app-config'

有谁知道这些警告的含义以及我是否应该担心它们？

我的版本

• 操作系统:Mac OS X El Capitan v10.11.6
• ng-cli: v1.0.0-beta.16
• Angular :v2.0.1
• typescript :v2.0.2

Answer 1

根据 comment关于问题https://github.com/angular/angular-cli/issues/2034

having the same issue. (Works fine despite warning) are you exporting more than one interface/class/const from the file? issue stopped for me after i exported each interface from its own dedicated file.

meaning if i had one file with multiple exports - i got warnings in build (export 'MyInterface1' was not found in '../file')

file.ts

export interface MyInterface1 {}
export interface MyInterface2 {}

after refactor - no warning

file1.ts

export interface MyInterface1 {}

file2.ts

export interface MyInterface2 {}