📱 Flutter
Beginner
What is the BottomNavigationBar widget?
Answer
BottomNavigationBar displays a row of navigation destinations at the bottom of the screen, following Material Design conventions. It is placed in the bottomNavigationBar slot of a Scaffold. Each destination is a BottomNavigationBarItem with an icon and a label. The currentIndex property tracks the selected tab, and onTap receives the tapped index. For more than 4 items or complex navigation, consider using NavigationBar (Material 3) instead.