diff --git a/designer-base/src/main/java/com/fr/design/ui/ModernUIPane.java b/designer-base/src/main/java/com/fr/design/ui/ModernUIPane.java
index 09fa2bbc0..5a0ead41e 100644
--- a/designer-base/src/main/java/com/fr/design/ui/ModernUIPane.java
+++ b/designer-base/src/main/java/com/fr/design/ui/ModernUIPane.java
@@ -203,6 +203,10 @@ public class ModernUIPane<T> extends BasicPane {
             this.pane = new ModernUIPane<>(browserType);
         }
 
+        public Builder(ModernUIPane<T> pane) {
+            this.pane = pane;
+        }
+
         public Builder<T> prepare(ScriptContextListener contextListener) {
             pane.browser.addScriptContextListener(contextListener);
             return this;
diff --git a/designer-base/src/main/java/com/fr/design/ui/compatible/NewModernUIPane.java b/designer-base/src/main/java/com/fr/design/ui/compatible/NewModernUIPane.java
index 2c8c891cb..59df782cd 100644
--- a/designer-base/src/main/java/com/fr/design/ui/compatible/NewModernUIPane.java
+++ b/designer-base/src/main/java/com/fr/design/ui/compatible/NewModernUIPane.java
@@ -206,6 +206,10 @@ public class NewModernUIPane<T> extends ModernUIPane<T> {
 
         private NewModernUIPane<T> pane = new NewModernUIPane<>();
 
+        public Builder() {
+            super((ModernUIPane<T>)null);
+        }
+
         public NewModernUIPane.Builder<T> prepare(InjectJsCallback callback) {
             pane.browser.set(InjectJsCallback.class, callback);
             return this;