题解 | #Proxy计数器#

let count = 0
            const _proxy = object => {
                // 补全代码
                const proxy=new Proxy(object,{
                    get(target,propkey){
                        if(propkey in target){
                            count++
                            return object   
                        }else{
                            count--
                        }
                    }
                })
                return proxy
            }