What is a Render Object? When Flutter draws your UI, it does not look at the tree of Widgets, but looks at the Render Objects’ one which controls all of the sizes, layouts and keeps all logic for painting the actual widget . That’s the reason why Render Object is very expensive to instantiate.15 Oca 2020
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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.
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