fix: deepMerge

src/utils/index.ts

@@ -58,26 +58,26 @@ export function deepMerge<T extends object | null | undefined, U extends object
   if (!source) {
     return target as T & U
   }
-  if (isArray(target) && isArray(source)) {
-    switch (mergeArrays) {
-      case 'union':
-        return unionWith(target, source, isEqual) as T & U
-      case 'intersection':
-        return intersectionWith(target, source, isEqual) as T & U
-      case 'concat':
-        return target.concat(source) as T & U
-      case 'replace':
-        return source as T & U
-      default:
-        throw new Error(`Unknown merge array strategy: ${mergeArrays}`)
+  return mergeWith({}, source, target, (sourceValue, targetValue) => {
+    if (isArray(targetValue) && isArray(sourceValue)) {
+      switch (mergeArrays) {
+        case 'union':
+          return unionWith(sourceValue, targetValue, isEqual)
+        case 'intersection':
+          return intersectionWith(sourceValue, targetValue, isEqual)
+        case 'concat':
+          return sourceValue.concat(targetValue)
+        case 'replace':
+          return targetValue
+        default:
+          throw new Error(`Unknown merge array strategy: ${mergeArrays as string}`)
+      }
     }
-  }
-  if (isObject(target) && isObject(source)) {
-    return mergeWith({}, target, source, (targetValue, sourceValue) => {
-      return deepMerge(targetValue, sourceValue, mergeArrays)
-    }) as T & U
-  }
-  return source as T & U
+    if (isObject(targetValue) && isObject(sourceValue)) {
+      return deepMerge(sourceValue, targetValue, mergeArrays)
+    }
+    return undefined
+  })
 }
 
 export function openWindow(url: string, opt?: { target?: TargetContext | string; noopener?: boolean; noreferrer?: boolean }) {