js深拷贝

deepClone(obj){

        let str,newObj;

        newObj= obj.constructor === Array ? [] : {};

        if(type obj!=='object'){

                return;

        }else if (JSON){

                str=JSON.stringify(obj);//序列化对象

                newObj = JSON.parse.(str);

        }else{

                for(let i in obj){

                        newObj[i]=typeof obj[i]==='object'? deepClone(obj[i]) : obj[i];

                }

        }

        return newObj;

}