23 lines
		
	
	
		
			457 B
		
	
	
	
		
			Dart
		
	
	
	
	
	
			
		
		
	
	
			23 lines
		
	
	
		
			457 B
		
	
	
	
		
			Dart
		
	
	
	
	
	
| // #docregion
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| import 'package:angular2/angular2.dart';
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| 
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| import 'logger_service.dart';
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| 
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| int nextId = 1;
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| 
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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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| class Spy implements OnInit, OnDestroy {
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|   int _id = nextId++;
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|   LoggerService _logger;
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| 
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|   Spy(this._logger);
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| 
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|   ngOnInit() => _logIt('onInit');
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| 
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|   ngOnDestroy() => _logIt('onDestroy');
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| 
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|   _logIt(String msg) => _logger.log('Spy #$_id $msg');
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| }
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