深拷贝的JS函数实现

function deepClone(obj){
    let cloneObj = Array.isArray(obj) ? []:{};
    if(obj && typeof obj ==="object"){
        for(var key in obj){
            if(obj.hasOwnProperty(key)){
                if(obj[key] && typeof obj[key] === "object"){
                    cloneObj[key] = deepClone(obj[key]);
                } else{
                    cloneObj[key] = obj[key]
                }
            }
        }
    }
    return cloneObj;
}