BlocBuilder is a Flutter widget which requires a bloc and a builder function . BlocBuilder handles building the widget in response to new states. BlocBuilder is very similar to StreamBuilder but has a more simple API to reduce the amount of boilerplate code needed.
Read moreWhich is best architecture for Flutter?
You can use well-known architectures such as MVC or MVVM. However, because Flutter is somewhat different from other programming languages and it’s widget-centric, BLoC is commonly considered the best Flutter architecture . The BLoC architecture is a flexible pattern that’s easy to maintain.
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