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                # instanceof屬性 >[danger]instanceof: 判斷當前對象是否是指定的類型,更深層次理解應該是,指定類型是否在當前實例對象的原型鏈上,如果是返回true,反之返回false。---判斷類型,找父親 ***** ```javascript //構造函數 function Person(name,age) { this.name = name;//私有的屬性 this.age = age; } //方法都加在原型上 Person.prototype = { constructor:Person, say:function () { console.log("我是公有的方法"); }, }; //實例化對象 var per1 = new Person("ZS",18); console.log(per1); console.log(per1 instanceof Person); ```
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