javascript深浅拷贝

		let arr = [1,2,[3,4],[5,6,[7,8]]]
        let obj = {name:'wl',info:{age:23,name:'wl'},job:['stu']}
        function deepCopy(obj){
            if(typeof obj != 'object')return
            let objType = obj.constructor.toString()
            if(objType.indexOf('Array')>-1){//深度拷贝数组
                let arr = []
                obj.forEach(item => {
                    if(typeof(item)!='object'){
                        arr.push(item)
                    }else{
                        arr.push(deepCopy(item))
                    }
                });
                return arr
            }else if(objType.indexOf('Object')>-1){//深度拷贝对象
                let o = {}
                let objKeys = Object.keys(obj)
                objKeys.forEach(item=>{
                    if(typeof(obj[item])!='object'){
                        o[item] = obj[item]
                    }else{
                        o[item] = deepCopy(obj[item])
                    } 
                })
                return o

            }
        }
        console.log(deepCopy(arr));
        console.log(deepCopy(obj));