深度拷貝的實現

//1. 判斷數據的類型
function checkType(target){
    return Object.prototype.toString.call(target).slice(8,-1)
}

//2.定義拷貝函數
function clone(target){
    let result,targetType =checkType(target);
    if( targetType===‘Object‘){
        result = {};
    }else if(targetType ==="Array"){
        result 
 
= [];
    }else{
        return target;
    }
    //遍歷數據結構中的每一項值
    for(let i in target){
        let value = target[i]
        if(checkType(value)===‘Object‘ || checkType(value)===‘Arrary‘){
            //繼續遍歷獲取到的值
            clone(value)
        }else{
            result=value
        }
    }
    
 
return result;
}

深拷貝 實現