JavaScript 对象深度克隆

       function deepClone(target, origin) {
            var target1 = (origin instanceof Array) ? [] : {}; //origin是对象还是数组
            var target = target || target1; 
            var toStr = Object.prototype.toString,
                isArray = "[object Array]";
            for(var key in origin) {
                if(origin.hasOwnProperty(key)) { // 判断key是否是origin自身的属性，如果是就拷贝
                    if(typeof origin[key] === 'object') { //该属性的值是引用值
                        if(toStr.call(origin[key]) === isArray) { //是数组
                            target[key] = [];
                        }else { //是对象
                            target[key] = {};
                        }
                        deepClone(target[key],origin[key]); //递归
                    }else{
                        target[key] = origin[key];
                    }
                    
                }
            }
            return target;
        }