本文實例講述了node.js實現(xiàn)的裝飾者模式。分享給大家供大家參考，具體如下：

裝飾者模式的實現(xiàn)更強調(diào)類的組合而不是通過繼承。這樣可以增強靈活性。在node.js 中，可以通過call函數(shù)實現(xiàn)。call函數(shù)可以在一個對象中調(diào)用另一個類的成員函數(shù)，從這種意義上達成類的組合目的。

var util = require('util');var Beverage = function(){  var description = "Unkown Beverage"  this.getDescription = function(){    return description;  }}function Espresso(){  Beverage.call(this);  this.description = "Espresso";}util.inherits(Espresso, Beverage);Espresso.prototype.cost = function(){  return 1.99;}function HouseBlend(){  Beverage.call(this);  this.description = "House Blend Coffee";}util.inherits(HouseBlend, Beverage);HouseBlend.prototype.cost = function(){  return .89;}function Mocha(beverage){  this.beverage = beverage;};Mocha.prototype.getDescription = function(){  return this.beverage.getDescription() + ", Mocha";}Mocha.prototype.cost = function(){  return 0.20 + this.beverage.cost();}function Whip(beverage){  this.beverage = beverage;};Whip.prototype.getDescription = function(){  return this.beverage.getDescription() + ", Whip";}Whip.prototype.cost = function(){  return 0.40 + this.beverage.cost();}var beverage = new Espresso();console.log(beverage.getDescription() + " $" + beverage.cost());var beverage2 = new HouseBlend();beverage2 = new Mocha(beverage2);beverage2 = new Mocha(beverage2);beverage2 = new Whip(beverage2);console.log(beverage2.getDescription() + " $" + beverage2.cost());

希望本文所述對大家node.js程序設(shè)計有所幫助。