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js Storage方法

我想封装自己的localStorage。重写getItemh和setItem,加上过期时间之类的,其他的clear、removeItem想延用原来的。
然后我看localStorage的原型是Storage,所以我也想继承,但是发现不行,为什么

localStorage.__proto__;     //  查看原型
typeof Storage;     //  function
new Storage();      //  Uncaught TypeError: Illegal constructor
Storage.clear();    //  Uncaught TypeError: Storage.clear is not a function

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因为 Storage 只是一个接口。


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