javascript - 覆盖 localStorage 的点符号

Question

我正在尝试覆盖访问 localStorage 的点符号。 我已经设法覆盖 getItem 和 setItem 方法，如下所述:Is it possible to override Local Storage and Session Storage separately in HTML5?

现在我尝试创建一个代理来捕获点访问，但是因为我似乎无法像这里尝试的那样覆盖 localStorage 对象

localStorage  = new Proxy(localStorage, {
get: function(target, name) {
    if (!(name in target)) {
        console.log("Getting non-existent property '" + name + "'");
        return undefined;
    }
    return '123';
},
set: function(target, name, value) {
    if (!(name in target)) {
        console.log("Setting non-existent property '" + name + "', initial value: " + value);
    }
    target[name] = value;
}
});

现在，当我尝试时，我仍然得到测试而不是 123:

localStorage.testKey = "test";
alert(localStorage.testKey)

Answer 1

如果您在 localStorage 上定义 getter，它应该可以工作:

Object.defineProperty(window, "localStorage", new (function () {
    this.get = function() {
      console.log("I'm getting called");
    }
})());