How does provider in Flutter work?

It’s the Element’s responsibility to tell Flutter that it has changed, and it needs to be repainted. This is done this via a method called markNeedsBuild , which is called internally . This matters to us (provider users) because all objects in Provider are widgets (and elements). They know how to interface with Flutter.

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How do you define a provider in Flutter?

The generics (values inside <> brackets) tell Flutter what type of provider to look for . Then Flutter goes up through the widget tree until it finds the provided value. If the value isn’t provided anywhere then an exception is thrown. Finally, once you’ve got the provider, you can call any method on it.12 Haz 2020

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When should I use providers Flutter?

One of the main reasons to prefer Provider over Statefulwidget s is that, using Provider , you will rebuild only the widgets that needs that value (the Consumers ) while the other will not be rebuilt . Instead when you call setState the whole build function of the widget will be called.19 May 2021

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