tempo-store

tempo-store contains utilities to wrap a value into a Store instance and track its lifecycle.

Property

A Property instance wraps a single generic value of type T. It exposes a field observable where you can add your own listeners. These will be triggered any time Property.set is invoked but only if the value differs from its previous state. To control such behavior it is possible to pass a function equal. The default implementation performs a structural equality test.

Store

A Store instance wraps a property and adds a reducer function to the mix. With the reducer it is possible to influence the value of store by invoking process(action: Action). Whenver that method is called, reducer(currentState: State, action: Action): State is invoked and the value of store is accordinlgy updated. It is possible to monitor state changes and action triggers by adding listeners to the observable field. Note that these listeners should have the shape (state: State, action: Action, changed: boolean) => void.

More info on the tempo architecture can be found here.