diff --git a/eslint.config.js b/eslint.config.js
index b614137ec..6febe884d 100644
--- a/eslint.config.js
+++ b/eslint.config.js
@@ -26,6 +26,7 @@ export default tseslint.config([
       ecmaVersion: 2020,
       globals: globals.browser,
       parserOptions: {
+        projectService: true,
         tsconfigRootDir: import.meta.dirname
       }
     },
@@ -67,16 +68,23 @@ export default tseslint.config([
           ignoreRestSiblings: true
         }
       ],
+      "@typescript-eslint/no-misused-spread": ["error", {}],
       "sonarjs/cognitive-complexity": "off",
+      "sonarjs/deprecation": "off",
+      "sonarjs/different-types-comparison": "off",
+      "sonarjs/function-return-type": "off",
       "sonarjs/no-commented-code": "off",
-      "sonarjs/no-small-switch": "off",
-      "sonarjs/todo-tag": "off",
+      "sonarjs/no-dead-store": "off",
+      "sonarjs/no-duplicated-branches": "off",
+      "sonarjs/no-nested-conditional": "off",
       "sonarjs/no-nested-functions": "off",
+      "sonarjs/no-small-switch": "off",
       "sonarjs/no-unused-vars": "off",
-      "sonarjs/no-nested-conditional": "off",
-      "sonarjs/no-dead-store": "off",
+      "sonarjs/prefer-read-only-props": "off",
+      "sonarjs/prefer-regexp-exec": "off",
       "sonarjs/slow-regex": "off",
-      "sonarjs/no-duplicated-branches": "off"
+      "sonarjs/todo-tag": "off",
+      "sonarjs/use-type-alias": "off"
     }
   }
 ]);
diff --git a/lib/components/group/sortByElementOffset.ts b/lib/components/group/sortByElementOffset.ts
index cb9feffde..fe6f3e7aa 100644
--- a/lib/components/group/sortByElementOffset.ts
+++ b/lib/components/group/sortByElementOffset.ts
@@ -4,7 +4,7 @@ export function sortByElementOffset<
   Type extends { element: HTMLElement },
   ReturnType extends Type[]
 >(orientation: Orientation, panelsOrSeparators: Type[]): ReturnType {
-  return panelsOrSeparators.sort(
+  return Array.from(panelsOrSeparators).sort(
     orientation === "horizontal" ? horizontalSort : verticalSort
   ) as ReturnType;
 }
diff --git a/tsconfig.json b/tsconfig.json
index 3ba460209..15c781ae6 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -32,7 +32,10 @@
     ]
   },
   "include": [
+    "vite.config.ts",
+    "vitest.config.ts",
     "vitest.d.ts",
+    "vitest.setup.ts",
     "lib",
     "integrations",
     "scripts",