Logger Decorator

Decorator.js

function logger() {                                        
  return function (target, key, descriptor) {              
    const initialValue = descriptor.value;                 
    descriptor.value = function() {                        
      console.log(`>"${key}" with`, arguments);            
      return  initialValue.apply(null, arguments);         
    };                                                     
    return descriptor;                                     
  }                                                        
}                                                          
                                                           
class MyText {                                             
                                                           
  @logger()                                                
  isProcessing() {                                         
    return [1,2,3,4,5]                                     
  }                                                        
                                                           
  @logger()                                                
  isCalculating(values) {                                  
    return values.map((v) => v + v )                       
  }                                                        
                                                           
  render() {                                               
    const output = this.isProcessing();                    
    const result = this.isCalculating(output);             
    console.log(result);                                   
  }                                                        
}                                                          
                                                           
                                                           
myText = new MyText()                                     
myText.render();