diff --git a/doric-js/index.d.ts b/doric-js/index.d.ts
index fc905135..e811e19d 100644
--- a/doric-js/index.d.ts
+++ b/doric-js/index.d.ts
@@ -1266,12 +1266,11 @@ declare module 'doric/lib/src/pattern/mvvm' {
         abstract onAttached(state: M, vh: V): void;
         abstract onBind(state: M, vh: V): void;
     }
-    export type ViewModelClass<M, V extends ViewHolder> = new (m: M, v: V) => ViewModel<M, V>;
-    export type ViewHolderClass<V> = new () => V;
+    export type ClassType<T> = new (...args: any) => T;
     export abstract class VMPanel<M extends Object, V extends ViewHolder> extends Panel {
-        abstract getViewModelClass(): ViewModelClass<M, V>;
+        abstract getViewModelClass(): ClassType<ViewModel<M, V>>;
         abstract getState(): M;
-        abstract getViewHolderClass(): ViewHolderClass<V>;
+        abstract getViewHolderClass(): ClassType<V>;
         getViewModel(): ViewModel<M, V> | undefined;
         build(root: Group): void;
     }
diff --git a/doric-js/lib/src/pattern/mvvm.d.ts b/doric-js/lib/src/pattern/mvvm.d.ts
index b7f06e20..78bfe5bd 100644
--- a/doric-js/lib/src/pattern/mvvm.d.ts
+++ b/doric-js/lib/src/pattern/mvvm.d.ts
@@ -15,14 +15,13 @@ export declare abstract class ViewModel<M extends Object, V extends ViewHolder>
     abstract onAttached(state: M, vh: V): void;
     abstract onBind(state: M, vh: V): void;
 }
-export declare type ViewModelClass<M, V extends ViewHolder> = new (m: M, v: V) => ViewModel<M, V>;
-export declare type ViewHolderClass<V> = new () => V;
+export declare type ClassType<T> = new (...args: any) => T;
 export declare abstract class VMPanel<M extends Object, V extends ViewHolder> extends Panel {
     private vm?;
     private vh?;
-    abstract getViewModelClass(): ViewModelClass<M, V>;
+    abstract getViewModelClass(): ClassType<ViewModel<M, V>>;
     abstract getState(): M;
-    abstract getViewHolderClass(): ViewHolderClass<V>;
+    abstract getViewHolderClass(): ClassType<V>;
     getViewModel(): ViewModel<M, V> | undefined;
     build(root: Group): void;
 }
diff --git a/doric-js/src/pattern/mvvm.ts b/doric-js/src/pattern/mvvm.ts
index be913266..8e49ac9a 100644
--- a/doric-js/src/pattern/mvvm.ts
+++ b/doric-js/src/pattern/mvvm.ts
@@ -54,20 +54,19 @@ export abstract class ViewModel<M extends Object, V extends ViewHolder> {
 
     abstract onBind(state: M, vh: V): void
 }
-export type ViewModelClass<M, V extends ViewHolder> = new (m: M, v: V) => ViewModel<M, V>
 
-export type ViewHolderClass<V> = new () => V
+export type ClassType<T> = new (...args: any) => T
 
 export abstract class VMPanel<M extends Object, V extends ViewHolder> extends Panel {
 
     private vm?: ViewModel<M, V>
     private vh?: V
 
-    abstract getViewModelClass(): ViewModelClass<M, V>
+    abstract getViewModelClass(): ClassType<ViewModel<M, V>>
 
     abstract getState(): M
 
-    abstract getViewHolderClass(): ViewHolderClass<V>
+    abstract getViewHolderClass(): ClassType<V>
 
     getViewModel() {
         return this.vm