Stateful and Stateless Widget
Explore the concepts of StatefulWidget and StatelessWidget in Flutter. Understand how state changes impact UI rendering, why choosing the right widget type affects app performance, and how to implement state management effectively using setState to update your app interface.
We'll cover the following...
To make any Dart class a Flutter widget, we have to extend that class. This class can extend either StatelessWidget or StatefulWidget abstract classes. These two widget classes come shipped with Flutter SDK. We’ll go over both abstract classes in detail.
State
The state is a change in our domain objects. Assume we are making an Instagram app in which we have a post domain object with fields like postedBy, createdAt, numberOfLikes, etc.
These fields together make up a state for this particular post object. Now suppose a follower clicks the “Like” button on this particular post. The numberOfLikes changes, so basically, the state changes. Whenever a state changes, we as a developer have two options—either to show the ...