简单的深拷贝

function deepClone(obj){
    if(typeof obj != 'object') return
    let newObj = obj instanceof Array?[]:{}
    for (const key in obj) {
        if(obj.hasOwnProperty(key)){
            newObj[key] = typeof obj[key]==="object"?deepClone(obj[key]):obj[key]
        }
    }
    return newObj
}