响应式原理

let person = {
  name: "张三",
  age: 18
}
const p = new Proxy(person,{
  get(target, propName){
    return Reflect.get(target,propName)
  }
  set(target, propName,value){
    return Reflect.set(target,propName,value)
  }
  deleteProperty(target, propName) {
    return Reflect.deleteProperty(target,propName)
  }
  
})