diff --git a/typescript/base/combination/combo.ts b/typescript/base/combination/combo.ts
index 028414c82..0cae971cd 100644
--- a/typescript/base/combination/combo.ts
+++ b/typescript/base/combination/combo.ts
@@ -38,6 +38,9 @@ export declare class Combo extends Widget {
         hoverClass: string;
         belowMouse: boolean;
     }
+    resetListHeight(h: number): void;
+
+    resetListWidth(w: number): void;
 
     populate(...args: any[]): void;
 
diff --git a/typescript/base/combination/expander.ts b/typescript/base/combination/expander.ts
new file mode 100644
index 000000000..781104f83
--- /dev/null
+++ b/typescript/base/combination/expander.ts
@@ -0,0 +1,40 @@
+import { Widget } from "../../core/widget";
+
+export declare class Expander extends Widget {
+    static xtype: string;
+
+    static EVENT_EXPAND: number;
+    static EVENT_COLLAPSE: number;
+    static EVENT_TRIGGER_CHANGE: number;
+    static EVENT_CHANGE: number;
+    static EVENT_AFTER_INIT: number;
+    static EVENT_BEFORE_POPUPVIEW: string;
+    static EVENT_AFTER_POPUPVIEW: string;
+    static EVENT_BEFORE_HIDEVIEW: string;
+    static EVENT_AFTER_HIDEVIEW: string;
+
+    populate(items?: any, ...args: any[]): void;
+
+    setValue(v: string): void;
+
+    getValue(): string;
+
+    isViewVisible(): boolean;
+
+    isExpanded(): boolean;
+
+    showView(): void;
+
+    hideView(): void;
+
+    getView(): any;
+
+    getAllLeaves<T>(): T[];
+
+    getNodeById<T>(id: string): T;
+
+    getNodeByValue<T>(v: string): T;
+
+    destroy(): void;
+
+}
diff --git a/typescript/index.ts b/typescript/index.ts
index 47816ea45..bc977f9f1 100644
--- a/typescript/index.ts
+++ b/typescript/index.ts
@@ -82,6 +82,7 @@ import { SimpleColorChooser } from "./case/colorchooser/colorchooser.simple";
 import { A } from "./base/a/a";
 import { Html } from "./base/single/html/html";
 import { Switcher } from "./base/combination/switcher";
+import { Expander } from './base/combination/expander';
 import { Loader } from "./base/combination/loader";
 import { ListPane } from "./case/layer/pane.list";
 import { MultiPopupView } from './case/layer/layer.multipopup';
@@ -267,6 +268,7 @@ export interface BI extends _func, _i18n, _base, _inject, _var, _web, _utils {
     A: typeof A;
     Html: typeof Html;
     Switcher: typeof Switcher;
+    Expander: typeof Expander;
     Loader: typeof Loader;
     ListPane: typeof ListPane;
     MultiPopupView: typeof MultiPopupView;
@@ -415,6 +417,7 @@ export {
     A,
     Html,
     Switcher,
+    Expander,
     BubbleCombo,
     Loader,
     ListPane,