Warning

This logger is under active development and hasn't yet reached its final form.

It may not be fully compatible with current versions of Angular.

Ngx-logger

This is a simple library to log in Angular

Features:

• a simple logger service
• a simple log consumer which log in console
• unit tests for the library
• a demo application

Common tasks are present as npm scripts:

• npm start to run a live-reload server with the demo app
• npm run test to test in watch mode, or npm run test:once to only run once
• npm run build to build the library
• npm run lint to lint
• npm run clean to clean
• npm run integration to run the integration e2e tests
• npm install ./relative/path/to/lib after npm run build to test locally in another app

To use this librairie :

@NgModule({
  imports: [
    LoggerModule.forRoot(LogLevelEnum.debug) // Set here the minimum log level
  ],
  providers: [
    ConsoleConsumer // Provide one or many Consumers
  ]
})
export class LoggerModule {
  // Inject eager provider to avoid lazy loading for this
  constructor(private consoleConsumer: ConsoleConsumer) {}
}

To write some log consumers :

@Injectable()
export class ConsoleConsumer {
  constructor(private loggerService: LoggerService) {
    loggerService.getLogs()
      .subscribe(log => console[LogLevelEnum[log.level]](... log.payload));
  }
}

Just replace console[LogLevelEnum[log.level]](... log.payload) with your own code and instantiate your consumer.

For use the logger :

You have to inject in your constructor the LoggerService and get an new instance given the class name (prefix) and use this instance for log the information

Example:

export class AppComponent implements OnInit {
  logger: Logger;

  constructor(loggerService: LoggerService) {
    this.logger = loggerService.create(this.constructor.name);
  }

  ngOnInit() {
    this.logger.log('Init App component');
    setInterval(() => {
      this.logger.warn('Interval', new Date());
    }, 1000);

  }

}