66 lines
1.7 KiB
TypeScript
66 lines
1.7 KiB
TypeScript
// #docplaster
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// #docregion
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import { Component } from '@angular/core';
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import { FlyingHeroesPipe,
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FlyingHeroesImpurePipe } from './flying-heroes.pipe';
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import { HEROES } from './heroes';
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@Component({
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selector: 'flying-heroes',
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templateUrl: 'app/flying-heroes.component.html',
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styles: ['#flyers, #all {font-style: italic}'],
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pipes: [FlyingHeroesPipe]
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})
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// #docregion v1
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export class FlyingHeroesComponent {
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heroes: any[] = [];
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canFly = true;
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// #enddocregion v1
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mutate = true;
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title = 'Flying Heroes (pure pipe)';
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// #docregion v1
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constructor() { this.reset(); }
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addHero(name: string) {
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name = name.trim();
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if (!name) { return; }
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let hero = {name, canFly: this.canFly};
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// #enddocregion v1
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if (this.mutate) {
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// Pure pipe won't update display because heroes array reference is unchanged
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// Impure pipe will display
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// #docregion v1
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// #docregion push
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this.heroes.push(hero);
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// #enddocregion push
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// #enddocregion v1
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} else {
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// Pipe updates display because heroes array is a new object
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// #docregion concat
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this.heroes = this.heroes.concat(hero);
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// #enddocregion concat
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}
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// #docregion v1
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}
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reset() { this.heroes = HEROES.slice(); }
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}
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// #enddocregion v1
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////// Identical except for impure pipe //////
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// #docregion impure-component
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@Component({
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selector: 'flying-heroes-impure',
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templateUrl: 'app/flying-heroes.component.html',
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// #enddocregion impure-component
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styles: ['.flyers, .all {font-style: italic}'],
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// #docregion impure-component
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pipes: [FlyingHeroesImpurePipe]
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})
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export class FlyingHeroesImpureComponent extends FlyingHeroesComponent {
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title = 'Flying Heroes (impure pipe)';
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}
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// #docregion impure-component
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