Uses signalStore()

withState() for initial state

withComputed() for derived values

withMethods() for actions

patchState() for mutations

inject() for dependencies

No direct Observable subscription in component

Scoped providedIn

computed() not stored data

Loading/error state in store

createActionGroup()

createReducer() with on()

createFeatureSelector()

createSelector()

createEffect()

ofType() in effects

switchMap + catchError in effects

store.selectSignal() in component

provideStore() in bootstrap

provideEffects() in bootstrap

signal() replaces BehaviorSubject

asReadonly() for public exposure

set()/update() for mutations

toSignal() import path

toObservable() for Observable consumers

inject() for HTTP

No chaotic mixing

Optimistic update saves snapshot

Optimistic update applies immediately

Rollback on error