標籤：建構函式模式定義js對象
<!DOCTYPE html><html><head><meta charset="UTF-8"><title>Insert title here</title><script type="text/javascript">/* * 自訂javascript對象一： 定義一個函數的時候，首字母大小，預設為建構函式了 建構函式模式： 格式：function MyObject(){......js code......}如何遍曆對象的屬性：for in */ //定義一個函數的時候，首字母大小，預設為建構函式了 function MyObject(){ } var myobj=new MyObject(); //------------------------------------ //this:指的就是該對象建立出來的執行個體對象（在javascript要擯棄類的概念） function Student(name,age){ this.name=name; this.age=age; //給對象添加函數類型的屬性 this.getAge=function(){ return this.age; }; this.setAge=function(age2){ this.age=age2; }; } var stu1=new Student("胡哥","秘密"); alert(stu1.name); stu1.setAge(18); alert(stu1.getAge()); //給新對象添加屬性-這樣的寫法也是ok的啦 stu1.setName=function(name){ this.name=name } //-----------構造方法模式的優缺點------------------ //1.使用簡單 //2.缺點：所有新建立的代碼，都有相同的代碼塊，造成浪費空間 //遍曆對象的屬性 for(tt in stu1){ alert("屬性："+ttt); }</script></head><body></body></html>
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