signals-dart

What problem does it solve?

Signals-dart helps you design predictable, high-performance reactive state in Dart without unnecessary recomputation or UI churn by giving you advanced primitives for synchronous, asynchronous, and collection-driven reactivity.

Core Features & Use Cases

• Fine-grained reactivity with lazy evaluation: Use signal, computed, and effect to derive state and run side effects only when relevant dependencies change.
• Async reactive state composition: Model loading/value/error lifecycles with futureSignal, streamSignal, computedAsync, and aggregate multiple async sources via computedFrom.
• Reactive collections for granular updates: Use listSignal, setSignal, mapSignal, iterableSignal, and queueSignal to track mutations and trigger observers appropriately.
• State utilities for real applications: Apply linkedSignal for writable derived state overrides, trackedSignal for undo/redo history, timerSignal for periodic ticks, and connect for piping events into signals.
• Value semantics via options: Configure behavior using options classes (with copy/equality semantics) such as SignalOptions, ComputedOptions, AsyncSignalOptions, and collection-specific options.

Quick Start

Use the signals-dart skill to design a reactive counter with batch updates, a derived computed label, and an effect that logs changes while avoiding circular subscriptions.