diff --git a/typescript/base/single/iframe/iframe.ts b/typescript/base/single/iframe/iframe.ts
index a9a2c8bdf6..2b9f66db1b 100644
--- a/typescript/base/single/iframe/iframe.ts
+++ b/typescript/base/single/iframe/iframe.ts
@@ -10,7 +10,7 @@ export interface _Iframe extends _Single {
     getName(): string;
 }
 
-export declare class iframe extends Single {
+export declare class Iframe extends Single {
     static xtype: string;
 
     setSrc(v: string): void;
diff --git a/typescript/core/wrapper/layout/layout.card.ts b/typescript/core/wrapper/layout/layout.card.ts
index 35a4951430..91acaadbc0 100644
--- a/typescript/core/wrapper/layout/layout.card.ts
+++ b/typescript/core/wrapper/layout/layout.card.ts
@@ -14,7 +14,7 @@ export declare class CardLayout extends Layout {
 
     addCardByName(cardName: string, cardItem: any): Widget
 
-    showCardByName(cardName: string, action: any, callback: () => void): void;
+    showCardByName(cardName: string, action?: any, callback?: () => void): void;
 
     showLastCard(): void;
 
diff --git a/typescript/index.ts b/typescript/index.ts
index 710d899eeb..40b278f0c3 100644
--- a/typescript/index.ts
+++ b/typescript/index.ts
@@ -8,7 +8,7 @@ import { _Button, _ButtonStatic, Button } from "./base/single/button/buttons/but
 import { TextButton, _TextButton, _TextButtonStatic } from "./base/single/button/buttons/button.text";
 import { _IconTextItem, _IconTextItemStatic } from "./base/single/button/listitem/icontextitem";
 import { _Editor, _EditorStatic, Editor } from "./base/single/editor/editor";
-import { iframe, _Iframe } from "./base/single/iframe/iframe";
+import { Iframe, _Iframe } from "./base/single/iframe/iframe";
 import { _Checkbox, _CheckboxStatic } from "./base/single/input/checkbox";
 import { _Input, _InputStatic } from "./base/single/input/input";
 import { _AbstractLabel, AbstractLabel } from "./base/single/label/abstract.label";
@@ -348,5 +348,5 @@ export {
     CardLayout,
     DynamicYearMonthCombo,
     TimeCombo,
-    iframe,
+    Iframe,
 };