一篇文章搞懂JavaScript中的代理和代理的使用

const handler = {};
let target = {};//目标对象
let userProxy = new Proxy(target,handler);//成功实现代理！！
userProxy.a = 1;
console.log(target.a);//1
console.log(target == userProxy);//false

const handler = {
	get(target,prop,receiver){
		console.log('get!');
		return 'a';
	}
}
let target = {name:'tar'};
let userProxy = new Proxy(target,handler);
userProxy.name

 let target = {
	name:'ww'
	}
 const handlers = {
    get(tar, prop){
     	console.log('get');
     	return Reflect.get(...arguments); 
     },
     set(tar,prop){
		console.log('set');
		return Reflect.set(...arguments);
	 }
  }
  let userProxy = new Proxy(target, handlers);
  userProxy.name;
  userProxy.name = 'wqw';

let target = {}
  let handlers = {
    get: (target, property) => {
      target[property] = (property in target) ? target[property] : {}
      if (typeof target[property] === 'object') {
        return new Proxy(target[property], handlers)
      }
      return target[property]
    }
  }
  let proxy = new Proxy(target, handlers)
  console.log('z' in proxy.x.y) // false (其实这一步已经针对`target`创建了一个x.y的属性)
  proxy.x.y.z = 'hello'
  console.log('z' in proxy.x.y) // true
  console.log(target.x.y.z)     // hello