diff --git a/doric-demo/src/MultiPanelDemo.ts b/doric-demo/src/MultiPanelDemo.ts
index c7f0e608..b1521f43 100644
--- a/doric-demo/src/MultiPanelDemo.ts
+++ b/doric-demo/src/MultiPanelDemo.ts
@@ -32,6 +32,17 @@ class MultiPanelDemo extends Panel {
                             navigator(context).push(CounterPage)
                         }
                     }),
+                    label('Multi Panel').apply({
+                        width: 200,
+                        height: 50,
+                        backgroundColor: colors[0],
+                        textSize: 30,
+                        textColor: Color.WHITE,
+                        layoutConfig: layoutConfig().just(),
+                        onClick: () => {
+                            navigator(context).push(MultiPanelDemo)
+                        }
+                    }),
                 ],
                 {
                     layoutConfig: layoutConfig().most().configHeight(LayoutSpec.FIT),
diff --git a/doric-js/bundle/doric-sandbox.es5.js b/doric-js/bundle/doric-sandbox.es5.js
index eab49ee8..beff7d39 100644
--- a/doric-js/bundle/doric-sandbox.es5.js
+++ b/doric-js/bundle/doric-sandbox.es5.js
@@ -1205,19 +1205,21 @@ var doric = (function (exports) {
         });
     })(Reflect$1 || (Reflect$1 = {}));
 
-    var __extends = (undefined && undefined.__extends) || (function () {
-        var extendStatics = function (d, b) {
-            extendStatics = Object.setPrototypeOf ||
-                ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
-                function (d, b) { for (var p in b) { if (b.hasOwnProperty(p)) { d[p] = b[p]; } } };
-            return extendStatics(d, b);
-        };
-        return function (d, b) {
-            extendStatics(d, b);
-            function __() { this.constructor = d; }
-            d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
-        };
-    })();
+    /*
+     * Copyright [2019] [Doric.Pub]
+     *
+     * Licensed under the Apache License, Version 2.0 (the "License");
+     * you may not use this file except in compliance with the License.
+     * You may obtain a copy of the License at
+     *
+     * http://www.apache.org/licenses/LICENSE-2.0
+     *
+     * Unless required by applicable law or agreed to in writing, software
+     * distributed under the License is distributed on an "AS IS" BASIS,
+     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     * See the License for the specific language governing permissions and
+     * limitations under the License.
+     */
     function hookBeforeNativeCall(context) {
         if (context) {
             Reflect.defineMetadata('__doric_context__', context, global$1);
@@ -1396,19 +1398,11 @@ var doric = (function (exports) {
     function jsObtainEntry(contextId) {
         var context = jsObtainContext(contextId);
         var exportFunc = function (constructor) {
-            var _a;
-            (_a = context === null || context === void 0 ? void 0 : context.classes) === null || _a === void 0 ? void 0 : _a.set(constructor.name, constructor);
-            var ret = /** @class */ (function (_super) {
-                __extends(class_1, _super);
-                function class_1() {
-                    var _this = _super !== null && _super.apply(this, arguments) || this;
-                    _this.context = context;
-                    return _this;
-                }
-                return class_1;
-            }(constructor));
-            context === null || context === void 0 ? void 0 : context.register(new ret);
-            return ret;
+            context === null || context === void 0 ? void 0 : context.classes.set(constructor.name, constructor);
+            var ret = new constructor;
+            Reflect.set(ret, 'context', context);
+            context === null || context === void 0 ? void 0 : context.register(ret);
+            return constructor;
         };
         return function () {
             if (arguments.length === 1) {
diff --git a/doric-js/bundle/doric-sandbox.js b/doric-js/bundle/doric-sandbox.js
index 52d375a7..182a9265 100644
--- a/doric-js/bundle/doric-sandbox.js
+++ b/doric-js/bundle/doric-sandbox.js
@@ -1397,24 +1397,18 @@ var doric = (function (exports) {
     function jsObtainEntry(contextId) {
         const context = jsObtainContext(contextId);
         const exportFunc = (constructor) => {
-            var _a;
-            (_a = context === null || context === void 0 ? void 0 : context.classes) === null || _a === void 0 ? void 0 : _a.set(constructor.name, constructor);
-            const ret = class extends constructor {
-                constructor() {
-                    super(...arguments);
-                    this.context = context;
-                }
-            };
-            context === null || context === void 0 ? void 0 : context.register(new ret);
-            return ret;
+            context === null || context === void 0 ? void 0 : context.classes.set(constructor.name, constructor);
+            const ret = new constructor;
+            Reflect.set(ret, 'context', context);
+            context === null || context === void 0 ? void 0 : context.register(ret);
+            return constructor;
         };
         return function () {
             if (arguments.length === 1) {
                 const args = arguments[0];
                 if (args instanceof Array) {
                     args.forEach(clz => {
-                        var _a;
-                        (_a = context === null || context === void 0 ? void 0 : context.classes) === null || _a === void 0 ? void 0 : _a.set(clz.name, clz);
+                        context === null || context === void 0 ? void 0 : context.classes.set(clz.name, clz);
                     });
                     return exportFunc;
                 }
diff --git a/doric-js/bundle/doric-vm.js b/doric-js/bundle/doric-vm.js
index dd5fad09..5f96efe6 100644
--- a/doric-js/bundle/doric-vm.js
+++ b/doric-js/bundle/doric-vm.js
@@ -1420,24 +1420,18 @@ function jsCallEntityMethod(contextId, methodName, args) {
 function jsObtainEntry(contextId) {
     const context = jsObtainContext(contextId);
     const exportFunc = (constructor) => {
-        var _a;
-        (_a = context === null || context === void 0 ? void 0 : context.classes) === null || _a === void 0 ? void 0 : _a.set(constructor.name, constructor);
-        const ret = class extends constructor {
-            constructor() {
-                super(...arguments);
-                this.context = context;
-            }
-        };
-        context === null || context === void 0 ? void 0 : context.register(new ret);
-        return ret;
+        context === null || context === void 0 ? void 0 : context.classes.set(constructor.name, constructor);
+        const ret = new constructor;
+        Reflect.set(ret, 'context', context);
+        context === null || context === void 0 ? void 0 : context.register(ret);
+        return constructor;
     };
     return function () {
         if (arguments.length === 1) {
             const args = arguments[0];
             if (args instanceof Array) {
                 args.forEach(clz => {
-                    var _a;
-                    (_a = context === null || context === void 0 ? void 0 : context.classes) === null || _a === void 0 ? void 0 : _a.set(clz.name, clz);
+                    context === null || context === void 0 ? void 0 : context.classes.set(clz.name, clz);
                 });
                 return exportFunc;
             }
diff --git a/doric-js/lib/src/runtime/sandbox.d.ts b/doric-js/lib/src/runtime/sandbox.d.ts
index 6620fcf4..694dae80 100644
--- a/doric-js/lib/src/runtime/sandbox.d.ts
+++ b/doric-js/lib/src/runtime/sandbox.d.ts
@@ -23,14 +23,6 @@ export declare function __require__(name: string): any;
 export declare function jsRegisterModule(name: string, moduleObject: any): void;
 export declare function jsCallEntityMethod(contextId: string, methodName: string, args?: any): any;
 declare type ClassType<T> = new (...args: any) => T;
-export declare function jsObtainEntry(contextId: string): () => ((constructor: ClassType<object>) => {
-    new (...args: any): {
-        context: Context | undefined;
-    };
-}) | {
-    new (...args: any): {
-        context: Context | undefined;
-    };
-};
+export declare function jsObtainEntry(contextId: string): () => ClassType<object> | ((constructor: ClassType<object>) => ClassType<object>);
 export declare function jsCallbackTimer(timerId: number): void;
 export {};
diff --git a/doric-js/lib/src/runtime/sandbox.js b/doric-js/lib/src/runtime/sandbox.js
index 6d2808b8..ed2b22e0 100644
--- a/doric-js/lib/src/runtime/sandbox.js
+++ b/doric-js/lib/src/runtime/sandbox.js
@@ -215,24 +215,18 @@ export function jsCallEntityMethod(contextId, methodName, args) {
 export function jsObtainEntry(contextId) {
     const context = jsObtainContext(contextId);
     const exportFunc = (constructor) => {
-        var _a;
-        (_a = context === null || context === void 0 ? void 0 : context.classes) === null || _a === void 0 ? void 0 : _a.set(constructor.name, constructor);
-        const ret = class extends constructor {
-            constructor() {
-                super(...arguments);
-                this.context = context;
-            }
-        };
-        context === null || context === void 0 ? void 0 : context.register(new ret);
-        return ret;
+        context === null || context === void 0 ? void 0 : context.classes.set(constructor.name, constructor);
+        const ret = new constructor;
+        Reflect.set(ret, 'context', context);
+        context === null || context === void 0 ? void 0 : context.register(ret);
+        return constructor;
     };
     return function () {
         if (arguments.length === 1) {
             const args = arguments[0];
             if (args instanceof Array) {
                 args.forEach(clz => {
-                    var _a;
-                    (_a = context === null || context === void 0 ? void 0 : context.classes) === null || _a === void 0 ? void 0 : _a.set(clz.name, clz);
+                    context === null || context === void 0 ? void 0 : context.classes.set(clz.name, clz);
                 });
                 return exportFunc;
             }
diff --git a/doric-js/src/runtime/sandbox.es5.ts b/doric-js/src/runtime/sandbox.es5.ts
index 1f447206..ad284320 100644
--- a/doric-js/src/runtime/sandbox.es5.ts
+++ b/doric-js/src/runtime/sandbox.es5.ts
@@ -240,12 +240,11 @@ type ClassType<T> = new (...args: any) => T
 export function jsObtainEntry(contextId: string) {
     const context = jsObtainContext(contextId)
     const exportFunc = (constructor: ClassType<object>) => {
-        context?.classes?.set(constructor.name, constructor)
-        const ret = class extends constructor {
-            context = context
-        }
-        context?.register(new ret)
-        return ret
+        context?.classes.set(constructor.name, constructor)
+        const ret = new constructor
+        Reflect.set(ret, 'context', context)
+        context?.register(ret)
+        return constructor
     }
     return function () {
         if (arguments.length === 1) {
diff --git a/doric-js/src/runtime/sandbox.ts b/doric-js/src/runtime/sandbox.ts
index 3eca3eee..d4cc7ef2 100644
--- a/doric-js/src/runtime/sandbox.ts
+++ b/doric-js/src/runtime/sandbox.ts
@@ -278,19 +278,18 @@ type ClassType<T> = new (...args: any) => T
 export function jsObtainEntry(contextId: string) {
     const context = jsObtainContext(contextId)
     const exportFunc = (constructor: ClassType<object>) => {
-        context?.classes?.set(constructor.name, constructor)
-        const ret = class extends constructor {
-            context = context
-        }
-        context?.register(new ret)
-        return ret
+        context?.classes.set(constructor.name, constructor)
+        const ret = new constructor
+        Reflect.set(ret, 'context', context)
+        context?.register(ret)
+        return constructor
     }
     return function () {
         if (arguments.length === 1) {
             const args = arguments[0]
             if (args instanceof Array) {
                 args.forEach(clz => {
-                    context?.classes?.set(clz.name, clz)
+                    context?.classes.set(clz.name, clz)
                 })
                 return exportFunc
             } else {