Proxy能否访问类的私有字段？问题排查与解决方案咨询

我正在阅读MDN的Proxy文档，其中提到私有字段可以通过Proxy访问，尤其是以“To fix this....”开头的段落，但文档示例无法正常运行，我的代码及运行情况如下：

含私有字段的类代码 #

class Danger {
    #areYouSure = "magic";

    grave(){
        console.log("Yes, grave danger");
        return true;
    }

}

module.exports = Danger;

尝试用Proxy访问私有字段的代码 #

const Danger = require('./testing-private');

const handler = {
    get(target, property, receiver){
        return target[property];
    }
};
const dangerProxy = new Proxy(new Danger(), handler);

console.log("--------------------------------------", dangerProxy.areYouSure);

运行输出 #

-------------------------------------- undefined

修改后的报错情况 #

如果将代码中的dangerProxy.areYouSure替换为dangerProxy.#areYouSure，会抛出以下语法错误：

/home/zaphod/code/math/js-experiments/src/danger-proxy.js:29
console.log("--------------------------------------", dangerProxy.#areYouSure);
                                                                 ^

SyntaxError: Private field '#areYouSure' must be declared in an enclosing class
    at Object.compileFunction (node:vm:352:18)
    at wrapSafe (node:internal/modules/cjs/loader:1032:15)
    at Module._compile (node:internal/modules/cjs/loader:1067:27)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1155:10)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:77:12)
    at node:internal/main/run_main_module:17:47

请问是否有可行的解决方法，还是我的预期存在错误？

内容的提问来源于stack exchange，提问作者Kenneth Stephen