How do you rebuild a specific widget in flutter?

The solution is to pass a new Key to WidgetB every time we need it to be rebuilt : WidgetA will see that WidgetB has changed and will rebuild it when setState is called. In other words, whenever a stateful widget’s Key property changes, calling setState on its parent will force a rebuild of the stateful widget.12 Tem 2021

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If you call setState() on WidgetB it’ll rebuild itself and it’s descendants , no matter if they are Stateless or Stateful Widgets.

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