diff --git a/packages/@headlessui-react/src/components/combobox/combobox.tsx b/packages/@headlessui-react/src/components/combobox/combobox.tsx
index 3c6c114e2c..6c5a827c60 100644
--- a/packages/@headlessui-react/src/components/combobox/combobox.tsx
+++ b/packages/@headlessui-react/src/components/combobox/combobox.tsx
@@ -234,10 +234,11 @@ let ComboboxRoot = forwardRefWithAs(function Combobox<
     value: TType
     onChange(value: TType): void
     disabled?: boolean
+    __demoMode?: boolean
   },
   ref: Ref<TTag>
 ) {
-  let { value, onChange, disabled = false, ...passThroughProps } = props
+  let { value, onChange, disabled = false, __demoMode = false, ...passThroughProps } = props
 
   let comboboxPropsRef = useRef<StateDefinition['comboboxPropsRef']['current']>({
     value,
@@ -252,7 +253,7 @@ let ComboboxRoot = forwardRefWithAs(function Combobox<
   })
 
   let reducerBag = useReducer(stateReducer, {
-    comboboxState: ComboboxStates.Closed,
+    comboboxState: __demoMode ? ComboboxStates.Open : ComboboxStates.Closed,
     comboboxPropsRef,
     optionsPropsRef,
     inputPropsRef,
diff --git a/packages/@headlessui-react/src/components/dialog/dialog.tsx b/packages/@headlessui-react/src/components/dialog/dialog.tsx
index edf3e3a0fb..9d87f44231 100644
--- a/packages/@headlessui-react/src/components/dialog/dialog.tsx
+++ b/packages/@headlessui-react/src/components/dialog/dialog.tsx
@@ -112,10 +112,11 @@ let DialogRoot = forwardRefWithAs(function Dialog<
       open?: boolean
       onClose(value: boolean): void
       initialFocus?: MutableRefObject<HTMLElement | null>
+      __demoMode?: boolean
     },
   ref: Ref<HTMLDivElement>
 ) {
-  let { open, onClose, initialFocus, ...rest } = props
+  let { open, onClose, initialFocus, __demoMode = false, ...rest } = props
   let [nestedDialogCount, setNestedDialogCount] = useState(0)
 
   let usesOpenClosedState = useOpenClosed()
@@ -185,7 +186,7 @@ let DialogRoot = forwardRefWithAs(function Dialog<
   )
 
   let ready = useServerHandoffComplete()
-  let enabled = ready && dialogState === DialogStates.Open
+  let enabled = ready ? (__demoMode ? false : dialogState === DialogStates.Open) : false
   let hasNestedDialogs = nestedDialogCount > 1 // 1 is the current dialog
   let hasParentDialog = useContext(DialogContext) !== null