<h1>模板方法模式是為數不多基于繼承的設計模式，但javaScript語言實際上是沒有提供真正的類式繼承，繼承是通過        對象與對象之間委托來實現的。也就是說，雖然我們在形式上借鑒了提供類式繼承的語言，但并不理想。</h1>   <p>下面這段代碼可以達到和繼承一樣的效果。</p>   <script>      var Beverage = function( param ){                  var boilWater = function(){            console.log( "把水煮沸" );         };                  var brew = param.brew || function(){             throw new Error( "必須傳遞brew方法");         };                  var pourInCup = param.pourInCup || function(){            throw new Error( "必須傳遞pourInCup方法");         };                  var addCondiments = param.addCondiments || function(){            throw new Error( "必須傳遞addCondiments方法");         };                  var F = function(){};                  F.PRototype.init = function(){            boilWater();            brew();            pourInCup();            addCondiments();         };                  return F;      };            var Coffee = Beverage( {               brew: function(){            console.log( "用沸水泡咖啡" );         },         pourInCup: function(){            console.log( "把咖啡倒進杯子" );         },         addCondiments: function(){            console.log( "加糖和牛奶" );         }      } );            var coffee = new Coffee();      coffee.init();