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@datorama/akita-ng-effects
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Readme
Akita's target is to provide a simple API that enables you to use object oriented patterns to manage state in your application. Introducing Effects into your app is entirely optional and allows you to implement very sophisticated event-based architectures
Use effects to hook into your actions and act upon action events.
Just register your effects in the AkitaNgEffectsModule.
// Only use .forRoot() once in your base module.
@NgModule({
imports: [
CommonModule,
AkitaNgEffectModule.forRoot([NavigationEffects])
],
})
export class CoreDataModule {}
// Use .forFeature() on any feature module
@NgModule({
imports: [
CommonModule,
AkitaNgEffectModule.forFeature([NavigationEffects])
],
})
export class FeatureModule {}
Setup your actions, that the effects will listen for. The action events are published globally on the actions stream so every effect can listen for any action.
export const LOAD_MAIN_NAVIGATION = createAction('Load Main Navigation');
export const LOAD_MAIN_NAVIGATION_SUCCESS = createAction(
'Load Main Navigation Success',
props<{ mainNav: MainNavigation }>()
);
Use the effects to listen for any action event. You can publish other actions or run service tasks on any action event.
@Injectable({
providedIn: 'root',
})
export class NavigationEffects {
constructor(
// inject the actions stream
private actions$: Actions,
private navigationService: NavigationService,
private store: NavigationStore
) {}
// can also be immplemented with createEffect() function
@Effect()
loadMainNavigation$ = this.actions$.pipe(
ofType(LOAD_MAIN_NAVIGATION),
switchMap(_ => this.navigationService.LOAD_MAIN_NAVIGATION().pipe(
tap(mainNav => this.actions$.dispatch(loadMainNavigationSuccess({ mainNav }))))
)
);
@Effect()
loadMainNavigationSuccess$ = this.actions$.pipe(
ofType(loadMainNavigationSuccess),
map(({ mainNav }) => this.navigationService.updateNavigationTree(mainNav)),
tap(mainRoutes => this.store.updateNavigation(mainRoutes))
);
}
A possible use case for an action inside a guard.
@Injectable({
providedIn: 'root',
})
export class InitRouterGuard implements CanActivate {
constructor(
private navigationQuery: NavigationQuery,
private actions: Actions
) {}
canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean | UrlTree> {
return this.navigationQuery.isNavInitialized$.pipe(
tap((isInit) => {
if (!isInit) this.actions.dispatch(loadMainNavigation());
}),
filter(isInit => isInit),
map((val) => true)
);
}
}
FAQs
A Reactive State Management extension dealing with side effects.
The npm package @datorama/akita-ng-effects receives a total of 426 weekly downloads. As such, @datorama/akita-ng-effects popularity was classified as not popular.
We found that @datorama/akita-ng-effects demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 22 open source maintainers collaborating on the project.
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