Core topic

The reactive values themselves.

Signal holds a value you write. Computed derives one from other reactive values, lazily and with automatic dependency tracking. ReadonlySignal is the read-only supertype both implement — the type to expose when a consumer should read and listen, but never write.

All three are ChangeNotifiers implementing ValueListenable, so they plug into ValueListenableBuilder, Listenable.merge and any Flutter API that accepts a Listenable.

Classes

Computed<T>

A derived reactive value with automatic dependency tracking.

ReadonlySignal<T>

A read-only view of a reactive value.

Signal<T>

A reactive value built on ChangeNotifier.