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                # 原型對象的訪問和設置 ```javascript ~~~ //構造函數 function Person(name,age) { this.name = name; this.age = age; } // 把方法放在原型上,但是有問題,要是方法很多的話,會浪費資源 /* Person.prototype.sayHi = function () { console.log("世界你好"); };*/ // 把方法放在原型對象上 Person.prototype = { constructor:Person,//如果你把原型指向一個對象 {},那么千萬別忘了在對象里面要修改指向.不然指向會是Object sayHi:function () { console.log("世界你好"); }, eat:function () { console.log("是的,很好"); }, }; // 實例化對象 var per1 = new Person("wc",3); console.log(per1.name); console.log(per1.age); per1.sayHi(); //找父類 //萬物皆對象 ,所有人的對象都是指向Object console.log(per1.constructor);//找父類 不再原型對象里面改變指向的話則是Object ~~~ ```
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