WatchBuilder#
To watch a signal for changes in Flutter, use the WatchBuilder widget. This will only rebuild this widget method and not the entire widget tree.
final signal = signal(10);
...
@override
Widget build(BuildContext context) {
return WatchBuilder(
child: const Icon(Icons.add),
builder: (context, child) => Row(children: [Text('$signal'), child!]),
);
}
Constructors#
View Constructors
WatchBuilder({super.key, required this.builder, this.debugLabel, this.dependencies = const [], this.child})
Minimal builder for signal changes that rerender a widget tree.
final counter = signal(0);
...
WatchBuilder(
builder: (context, child) => Text('$counter')
)
Properties#
View Properties
T Function(BuildContext context, Widget? child) builder
The widget to rebuild when any signals change
String? debugLabel
Optional debug label to use for devtools
Widget? child
Cached widget to pass in
List<core.ReadonlySignal> dependencies
List of optional dependencies to watch