İnherited widget Flutter example

Ephemeral state (sometimes called UI state or local state) is the state you can neatly contain in a single widget .

This method is called after rebuilds and always passes in the old widget as an argument . This gives you a chance to check if Flutter should rebuild or not. For example, if your new widget is rebuilt with the same data, then there’s no need to make Flutter do the expensive work.

Why is the build method on State, and not StatefulWidget? Putting a Widget build(BuildContext context) method on State rather than putting a Widget build(BuildContext context, State state) method on StatefulWidget gives developers more flexibility when subclassing StatefulWidget.

In flutter, the inherited widget is a base class that allows those classes to extend the information under the tree from it. Inherited widgets are also a kind of state management technique. It works by telling registered build references when a change occurs .