svelte-asyncable

Extends the Svelte store contract, allowing async values to be used with auto-subscriptions and reactive patterns, just like regular stores, as shown in the README's Svelte component example.

Provides transparent getter and setter callbacks for async operations, simplifying side-effect management without manual promise handling, evident in the localStorage synchronization example.

Includes built-in optimistic update patterns, enabling immediate UI feedback before async operations complete, with automatic rollback on setter failures per the README.

Defers async calls until first subscription and caches results for the subscriber lifetime, reducing redundant network requests and improving performance, as detailed in the caching section.

Can derive from other stores, automatically re-evaluating when dependencies change, making it easy to compose async states, demonstrated with asyncable stores depending on each other.