🐛 fix code

Author: ConardLi

JavaScript/浅拷贝和深拷贝.md

@@ -16,15 +16,7 @@ arr.concat();
 
 ### 深拷贝
 
-我们也能用简单的办法实现深拷贝：
-
-`JSON.parse(JSON.stringify(obj))`
-
-
-
-手动实现：
-
-> 代码解析后面放出来。
+深拷贝解析：[如何写出一个惊艳面试官的深拷贝.](http://www.conardli.top/blog/article/JS%E8%BF%9B%E9%98%B6/%E5%A6%82%E4%BD%95%E5%86%99%E5%87%BA%E4%B8%80%E4%B8%AA%E6%83%8A%E8%89%B3%E9%9D%A2%E8%AF%95%E5%AE%98%E7%9A%84%E6%B7%B1%E6%8B%B7%E8%B4%9D.html)
 
 ```js
 const mapTag = '[object Map]';
@@ -139,22 +131,22 @@ function clone(target, map = new WeakMap()) {
 
     // 防止循环引用
     if (map.get(target)) {
-        return target;
+        return map.get(target);
     }
     map.set(target, cloneTarget);
 
     // 克隆set
     if (type === setTag) {
         target.forEach(value => {
-            cloneTarget.add(clone(value));
+            cloneTarget.add(clone(value,map));
         });
         return cloneTarget;
     }
 
     // 克隆map
     if (type === mapTag) {
         target.forEach((value, key) => {
-            cloneTarget.set(key, clone(value));
+            cloneTarget.set(key, clone(value,map));
         });
         return cloneTarget;
     }