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                [TOC] ## new ``` 1.實例化一個新對象 2.調用構造函數,將構造函數的this指向實例化對象 3.新對象 共享構造函數的基本方法和屬性 3.返回新對象 ``` ### 實例 ``` function Person(age) { this.age = age return this } var ding = new Person("age is " + '18') console.log(ding.age) ```
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