newAspects.js

class LoggerAspect {

  constructor(logger) {
    this.logger = logger;
  }
  
  before(context, joinPointName, ...args) {
    this.logger.log("logging");
  }
}

class TimeAspect {

  constructor(timer, logger) {
    this.timer = timer;
    this.logger = logger;
  }
  
  before() {
    this.timer.start();
  }
  
  after() {
    this.timer.stop();
    this.logger.log(this.timer.getTime());
  }
}