javascript - 从 getter 获取 Map 代理时接收器不兼容

Question

我被下面的代码困住了:

class Infrastructure {
  constructor () {
    this._devices = new Map([
    	['foo', 'bar']
    ])
  }
  
  get devices () {
    return new Proxy(this._devices, {})
  }
}

const infrastructure = new Infrastructure()
console.log(infrastructure.devices.get('foo'))

失败并出现以下错误:

Method Map.prototype.get called on incompatible receiver

我知道我需要在某个地方绑定(bind)一些东西，但我不得不承认我有点迷失了。

感谢您的帮助!

Answer 1

这样就可以解决问题了。一旦我有具体的解释就会更新。

class Infrastructure {
  constructor() {
    this._devices = new Map([
      ['foo', 'bar']
    ])
  }

  get devices() {
    return new Proxy(this._devices, {})
  }
};

const infrastructure = new Infrastructure()
console.log(infrastructure.devices.get.bind(infrastructure._devices)('foo'))