Flutter għandu żewġ tipi fundamentali ta' widgets: StatelessWidget (immutable, mingħajr stat intern li jibdel) u StatefulWidget (jista' jżomm u jaġġorna stat mutable, jiġbed mill-ġdid meta l-stat jibdel). Tagħżel it-twieħed korretta hija fundamentali għall-bini ta' UIs ta' Flutter.
StatelessWidget — mingħajr stat li jibdel
// a StatelessWidget: just describes UI based on its inputs (immutable, no internal state)
class Greeting extends StatelessWidget {
final String name;
const Greeting(this.name);
@override
Widget build(BuildContext context) {
return Text('Hello, $name'); // UI depends only on inputs, never changes itself
}
}
// → use for UI that doesn't change on its own (static content, displays based on inputs)
