The easiest way to add a badge to an IconButton is to use the Badge widget. Use this to show a numeric value or a custom label next to an icon.

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The post discusses the simple method of adding a badge to an IconButton using the Badge widget in Flutter. It highlights use cases such as displaying notification counts and custom labels, and mentions compatibility with NavigationRailDestination and BottomNavigationBarItem.

How to add a Badge to an IconButton