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                ### 構造函數 ~~~ <script> /* 構造函數:構造一個對象的函數 es6之前,使用構造函數模式一個類 */ function Person(name,age){ this.name = name; this.age = age; } // js的繼承是基于原型的繼承 /* 在原型上定義一個方法,那么所有實例化的對象都共享這個方法 */ Person.prototype.sayName=function(){ console.log(this.name); } /* new 1.調用了構造函數 2.實例化了一個對象 */ /* this-->指向實例化的對象 */ var quan = new Person("童",18); quan.sayName(); </script> ~~~
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