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                new操作符做了這些事: 1. 它創建了一個全新的對象 2. 它會被執行[[Prototype]](也就是__proto__)鏈接 3. 它使this指向新創建的對象 4. 通過new創建的每個對象將最終被[[Prototype]]鏈接到這個函數的prototype對象上 5. 如果函數沒有返回對象類型Object(包含Functoin, Array, Date, RegExg, Error),那么new表達式中的函數調用將返回該對象引用 ``` //模擬new function objectFactory() { const obj = new Object(); const Constructor = [].shift.call(arguments); obj.__proto__ = Constructor.prototype; const ret = Constructor.apply(obj, arguments); return typeof ret === "object" ? ret : obj; } ```
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