对象深拷贝实现

//递归实现
const deepClone = (obj) => {
        let newObj = {};
        for (const i in obj) {
            if (Object.hasOwnProperty.call(obj, i)) {
                if (obj[i] instanceof Object) {
                    newObj[i] = deepClone(obj[i]);
                } else {
                    newObj[i] = obj[i];
                }
            }
        }
        return newObj;
}

//序列化实现
const deepCloneWithJSON=(obj)=>{
        const str=JSON.stringify(obj);
        return JSON.parse(str);
}