RenderObjects are those particular “Objects” responsible for controlling the sizes, layouts, and logic used for painting widgets to the screen and forming the UI for the application . You can say that the actual rendering happens in RenderObjects.
Read moreWhat are elements in flutter?
Flutter framework creates the element tree which represents the rendered widget on the screen. An Element represents the use of a widget to configure a specific location in the tree . The element can change if the parent widget rebuilds and creates a new widget for this location.
Read moreWhat is a widget in Flutter?
Widgets are the central class hierarchy in the Flutter framework. A widget is an immutable description of part of a user interface . Widgets can be inflated into elements, which manage the underlying render tree. Widgets themselves have no mutable state (all their fields must be final).
Read more