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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                1. 向基礎數據類型添加屬性會怎么樣 ``` 'use strict' let str = 'computer' str.a = 3 ``` 2. 嚴格模式下會報錯,非嚴格模式下訪問a會返回undefined 3. 基本數據類型為什么可以有方法:JS引擎做了特殊對象操作,創建后再進行銷毀
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