添加深拷贝工具类

src/utils/deepCopy.js

@@ -0,0 +1,26 @@
+export const deepCopy = function(obj) {
+    if (obj == null) {
+        return null;
+    }
+    if (typeof obj !== "object") return obj;
+    let result;
+    if (Array.isArray(obj)) {
+        result = [];
+        obj.forEach(item => {
+            result.push(
+                typeof item === "object" && !(item instanceof Date)
+                    ? deepCopy(item)
+                    : item
+            );
+        });
+    } else {
+        result = {};
+        Object.keys(obj).forEach(key => {
+            result[key] =
+                typeof obj[key] === "object" && !(obj[key] instanceof Date)
+                    ? deepCopy(obj[key])
+                    : obj[key];
+        });
+    }
+    return result;
+};