What is a stateless widget?

A widget that does not require mutable state . A stateless widget is a widget that describes part of the user interface by building a constellation of other widgets that describe the user interface more concretely.

The runApp() function takes the given Widget and makes it the root of the widget tree. … A widget’s main job is to implement a build() function, which describes the widget in terms of other, lower-level widgets.

Flutter 2.5, the latest version of Google’s UI toolkit for native application development , offers better performance as well as full-screen enhancements for Android.