標籤：prototype js原型設計模式 javascript自訂對象
<!DOCTYPE html><html><head><meta charset="UTF-8"><title>Insert title here</title><script type="text/javascript">/* * 原型模式： prototype 原型屬性 對象的原型擁有的屬性，該對象的執行個體對象也會同時擁有 */ function Test(){}Test.age=20;var tt=new Test();//這種情況age屬性不會再new時候被添加哦alert(tt.age)//undefine//-------------------- function Test(){}Test.prototype.age=20;//指定原型有的屬性var tt=new Test();alert(tt.age)//這樣就有了值，非undefine了//-------------------------function Student(){};alert(Student.prototype);for(pro in Student.prototype){alert(pro);//彈出為空白，預設該對象沒有任何屬性}Student.prototype.name="黑馬";Student.prototype.age=3;Student.prototype.getName=function(){return this.name;}var stu1=new Student();//stu1.name="傳智"//會覆蓋原型屬性中的值delete stu1.name;//刪除對象執行個體的屬性，原型屬性還是存在的哦。alert(stu1.name);</script></head><body></body></html>Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
