Detailed explanation of js decoration design pattern

Decoration design mode:

Each device has its own unique application scenarios and ways to solve problems. The decoration design mode dynamically adds new functions to the object. , is a technique used to replace inheritance and extend the new functionality of an object without adding subclasses through inheritance. Using the association relationship of objects instead of inheritance relationship is more flexible and avoids the rapid expansion of the type system. This mode is suitable for use when the newly added functions are not enough to solve the problem at the expense of inheritance - killing a chicken with a butcher's knife ^_^
Decoration design pattern: Dynamically add some additional responsibilities to an object. To extend the functionality of an object, decorators provide a more flexible alternative than inheritance.

Structure diagram:

Interface

var Bicycle = new Interface('Bicycle', ['assemble', 'wash', 'repair', 'getPrice']);

Object class

var AcmeComfortCuiser = function(){
  
};
AcmeComfortCuiser.prototype = {
  assemble: function(){
    
  },
  wash: function(){
    
  },
  repair: function(){
    
  },
  getPrice: function(){
    
  }
}

Decoration class

var BicycleDecorator = function(bicycle){
  Interface.ensureImplements(bicycle, Bicycle);
  this.bicycle = bicycle;
};
BicycleDecorator.prototype = {
  assemble: function(){
    return this.bicycle.assemble();
  },
  wash: function(){
    return this.bicycle.wash();
  },
  repair: function(){
    return this.bicycle.repair();
  },
  getPrice: function(){
    return this.bicycle.getPrice();
  }
}

Extension class

  var HeadlightDecorator = function(bicycle){
    BicycleDecorator.call(this, bicycle);
  };
  extend(HeadlightDecorator, BicycleDecorator);
  HeadlightDecorator.prototype.getPrice = function(){
    return this.bicycle.getPrice() + 15.00;
  }

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