25 lines
597 B
TypeScript
25 lines
597 B
TypeScript
// #docregion
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import { Directive, OnInit, OnDestroy } from '@angular/core';
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import { LoggerService } from './logger.service';
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let nextId = 1;
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// #docregion spy-directive
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// Spy on any element to which it is applied.
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// Usage: <div mySpy>...</div>
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@Directive({selector: '[mySpy]'})
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export class SpyDirective implements OnInit, OnDestroy {
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constructor(private logger: LoggerService) { }
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ngOnInit() { this.logIt(`onInit`); }
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ngOnDestroy() { this.logIt(`onDestroy`); }
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private logIt(msg: string) {
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this.logger.log(`Spy #${nextId++} ${msg}`);
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}
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}
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// #enddocregion spy-directive
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