Proxy：代理 - JavaScript |MDN网络 (mozilla.org)

首先要确定Proxy的入参：new Proxy 的两个参数分别是目标对象和处理程序。

如下，写了个只有两个方法的Proxy

let target = {name:'张三',age:18};
let handler = {
  get(target, property, receiver) {
    console.log(`Get ${property}`);
    return Reflect.get(target, property, receiver);
  },
  set(target, property, value, receiver) {
    console.log(target, property, value, receiver);
    Reflect.set(target, property, value, receiver);
  },
};

let proxy = new Proxy(target, handler);
console.dir(proxy);

从Mdn中抄一下其他方法

这里还给他多写了两个方法