64bce18ea7
Fixes #2493 No need to dual boot `AppComponent` and `ProvidersComponent` only to ensure that we could demo optional injection; instead just inject null for the `@Optional` constructor parameter type. No prose is affected by these changes.
49 lines
1.2 KiB
TypeScript
49 lines
1.2 KiB
TypeScript
// #docplaster
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// #docregion
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// #docregion imports
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import { Component, Inject } from '@angular/core';
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import { APP_CONFIG, AppConfig } from './app.config';
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import { Logger } from './logger.service';
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import { UserService } from './user.service';
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// #enddocregion imports
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@Component({
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selector: 'my-app',
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template: `
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<h1>{{title}}</h1>
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<my-car></my-car>
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<my-injectors></my-injectors>
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<my-tests></my-tests>
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<h2>User</h2>
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<p id="user">
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{{userInfo}}
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<button (click)='nextUser()'>Next User</button>
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<p>
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<my-heroes id="authorized" *ngIf="isAuthorized"></my-heroes>
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<my-heroes id="unauthorized" *ngIf="!isAuthorized"></my-heroes>
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<my-providers></my-providers>
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`,
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providers: [Logger]
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})
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export class AppComponent {
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title: string;
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// #docregion ctor
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constructor(
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@Inject(APP_CONFIG) config: AppConfig,
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private userService: UserService) {
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this.title = config.title;
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}
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// #enddocregion ctor
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get isAuthorized() { return this.user.isAuthorized; }
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nextUser() { this.userService.getNewUser(); }
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get user() { return this.userService.user; }
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get userInfo() {
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return `Current user, ${this.user.name}, is ` +
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`${this.isAuthorized ? '' : 'not'} authorized. `;
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}
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}
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