add version information

nicegui/background_tasks.py

@@ -54,7 +54,10 @@ F = TypeVar('F', bound=Callable)
 
 
 def await_on_shutdown(func: F) -> F:
-    """Tag a coroutine function so tasks created from it won't be cancelled during shutdown."""
+    """Tag a coroutine function so tasks created from it won't be cancelled during shutdown.
+
+    *Added in version 2.16.0*
+    """
     functions_awaited_on_shutdown.add(func)
     return func
 

nicegui/element.py

@@ -534,5 +534,8 @@ class Element(Visibility):
 
     @property
     def html_id(self) -> str:
-        """The ID of the element in the HTML DOM."""
+        """The ID of the element in the HTML DOM.
+
+        *Added in version 2.16.0*
+        """
         return f'c{self.id}'

website/documentation/content/section_configuration_deployment.py

@@ -122,13 +122,13 @@ def env_var_demo():
 @doc.demo('Background Tasks', '''
     `background_tasks.create()` allows you to run an async function in the background and return a task object.
     By default the task will be automatically cancelled during shutdown.
-    You can prevent this by using the `@background_tasks.await_on_shutdown` decorator.
+    You can prevent this by using the `@background_tasks.await_on_shutdown` decorator (added in version 2.16.0).
     This is useful for tasks that need to be completed even when the app is shutting down.
 ''')
 def background_tasks_demo():
-    from nicegui import background_tasks
+    # import aiofiles
     import asyncio
-    import aiofiles
+    from nicegui import background_tasks
 
     results = {'answer': '?'}