@ngworker/router-component-store
A strictly typed lightweight alternative to NgRx Router Store (@ngrx/router-store
) and ActivatedRoute
.
Required peer dependencies:
- Angular >=15.0
- NgRx Component Store >=15.0
- RxJS >=7.5
- TypeScript >=4.8
Published with partial Ivy compilation.
Find additional documentation in the github.com/ngworker/router-component-store/docs directory.
Router Component Store is meant as a lightweight alternative to NgRx Router Store that additionaly can be used as a replacement for ActivatedRoute
at any route level.
The following principles guide the development of Router Component Store.
- The global router store closely matches NgRx Router Store selectors
- Local router stores closely match
ActivatedRoute
observable properties - Router state is immutable and serializable
- The API is strictly and strongly typed
A RouterStore
service has the following public properties.
API | Description |
---|---|
currentRoute$: Observable<MinimalActivatedRouteSnapshot> |
Select the current route. |
fragment$: Observable<string | null> |
Select the current route fragment. |
queryParams$: Observable<StrictRouteParams> |
Select the current route query parameters. |
routeData$: Observable<StrictRouteData> |
Select the current route data. |
routeParams$: Observable<StrictRouteParams> |
Select the current route parameters. |
title$: Observable<string | undefined> |
Select the resolved route title. |
url$: Observable<string> |
Select the current URL. |
selectQueryParam(param: string): Observable<string | undefined> |
Select the specified query parameter. |
selectRouteData(key: string): Observable<unknown> |
Select the specified route data. |
selectRouteParam(param: string): Observable<string | undefined> |
Select the specified route parameter. |
selectRouterEvents(...acceptedRouterEvents: RouterEvent[]): Observable<RouterEvent> |
Select router events of the specified router event types. |
A RouterStore
service is provided by using either provideGlobalRouterStore
or provideLocalRouterStore
.
The global RouterStore
service is provided in a root environment injector and is never destroyed but can be injected in any injection context.
It emits values similar to @ngrx/router-store
selectors. A comparison is in the documentation.
A local RouterStore
requires a component-level provider, follows the lifecycle of that component, and can be injected in declarables as well as other component-level services.
It emits values similar to ActivatedRoute
. A comparison is in the documentation.
An application-wide router store that can be injected in any injection context. Use provideGlobalRouterStore
to provide it in a root environment injector.
Use a global router store instead of NgRx Router Store.
Providing in a standalone Angular application:
// main.ts
// (...)
import { provideGlobalRouterStore } from '@ngworker/router-component-store';
bootstrapApplication(AppComponent, {
providers: [provideGlobalRouterStore()],
}).catch((error) => console.error(error));
Providing in a classic Angular application:
// app.module.ts
// (...)
import { provideGlobalRouterStore } from '@ngworker/router-component-store';
@NgModule({
// (...)
providers: [provideGlobalRouterStore()],
})
export class AppModule {}
Usage in service:
// hero.service.ts
// (...)
import { RouterStore } from '@ngworker/router-component-store';
@Injectable({
providedIn: 'root',
})
export class HeroService {
#routerStore = inject(RouterStore);
activeHeroId$: Observable<string | undefined> =
this.#routerStore.selectRouteParam('id');
}
Usage in component:
// hero-detail.component.ts
// (...)
import { RouterStore } from '@ngworker/router-component-store';
@Component({
// (...)
})
export class HeroDetailComponent {
#routerStore = inject(RouterStore);
heroId$: Observable<string | undefined> =
this.#routerStore.selectRouteParam('id');
}
A component-level router store. Can be injected in any directive, component,
pipe, or component-level service. Explicitly provided in a component sub-tree
using Component.providers
or Component.viewProviders
.
Use a local router store instead of ActivatedRoute
.
Usage in component:
// hero-detail.component.ts
// (...)
import {
provideLocalRouterStore,
RouterStore,
} from '@ngworker/router-component-store';
@Component({
// (...)
providers: [provideLocalRouterStore()],
})
export class HeroDetailComponent {
#routerStore = inject(RouterStore);
heroId$: Observable<string | undefined> =
this.#routerStore.selectRouteParam('id');
}
Several of the Angular Router's types are recursive which means that they aren't serializable. The router stores exclusively use serializable types to support advanced state synchronization strategies.
The MinimalActivatedRouteSnapshot
interface is used for the observable RouterStore#currentRoute$
property. This interface is a serializable subset of the Angular Router's ActivatedRouteSnapshot
class and has the following public properties.
API | Description |
---|---|
children: MinimalActivatedRouteSnapshot[] |
The children of this route in the route tree. |
data: StrictRouteData |
The static and resolved data of this route. |
firstChild: MinimalActivatedRouteSnapshot | null |
The first child of this route in the route tree. |
fragment: string | null |
The URL fragment shared by all routes. |
outlet: string |
The outlet name of the route. |
params: StrictRouteParams |
The matrix parameters scoped to this route. |
queryParams: StrictRouteParams |
The query parameters shared by all routes. |
routeConfig: Route | null |
The configuration used to match this route. |
title: string | undefined |
The resolved route title. |
url: UrlSegment[] |
The URL segments matched by this route. |
The StrictRouteData
interface is used for the MinimalActivatedRouteSnapshot#data
and RouterStore#routeData$
properties. This interface is a serializable subset of the Angular Router's Data
type. In particular, the symbol
index in the Angular Router's Data
type is removed. Additionally, the any
member type is replaced with unknown
for stricter typing.
StrictRouteData
has the following signature.
export type StrictRouteData = {
readonly [key: string]: unknown;
};
The StrictRouteParams
type is used for route parameters in the MinimalActivatedRouteSnapshot#params
and RouterStore#routeParams$
properties and for query parameters in the MinimalActivatedRouteSnapshot#queryParams
and RouterStore#queryParams$
properties. It is a strictly typed version of the Angular Router's Params
type where members are read-only and the any
member type is replaced with string | undefined
.
StrictRouteParams
has the following signature.
export type StrictRouteParams = {
readonly [key: string]: string | undefined;
};