Angular Architectures with Signals

@ManfredSteyer ManfredSteyer Angular Architectures with Signals

@ManfredSteyer Signal as Producer 4711 Consumer read set notify 4712

@ManfredSteyer flights = signal<Flight[]>([]); const flights = await this.flightService.findAsPromise(from, to);
this.flights.set(flights); <div *ngFor="let f of flights()"> <flight-card [item]="f" /> </div>

@ManfredSteyer Simple Reactive Building Block Fine-grained CD Zone-less CD Interop
with RxJS No need to unsubscribe

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@ManfredSteyer Manfred Steyer

@ManfredSteyer

@ManfredSteyer @Injectable({ providedIn: 'root' }) export class FlightBookingFacade { […]
private _flights = signal<Flight[]>([]); readonly flights = this._flights.asReadonly(); async load(from: string, to: string) { const flights = await […]; this._flights.set(flights); } }

private _flights = signal<Flight[]>([]); readonly flights = this._flights.asReadonly(); private _from = signal('Hamburg'); readonly from = this._from.asReadonly(); private _to = signal('Graz'); readonly to = this._to.asReadonly(); […] }

private state = signal({ from: 'Hamburg', to: 'Graz', flights: [] as Flight[], […] }); […] }

private state = signal({ from: 'Hamburg', to: 'Graz', flights: [] as Flight[], […] }); readonly flights = computed(() => this.state().flights); readonly from = computed(() => this.state().from); […] }

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@ManfredSteyer select(selector) selectSignal(selector)

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@ManfredSteyer @Injectable({ providedIn: 'root' }) export class FlightBookingFacade { private
state = signalState({ from: 'Paris', to: 'London', flights: [] as Flight[], basket: {} as Record<number, boolean>, }); readonly flights = this.state.flights; readonly from = this.state.from; […] }

readonly selected = computed( () => this.flights().filter((f) => this.basket()[f.id]) ); […] }

updateCriteria(from: string, to: string): void { patchState(this.state, { from, to }) } […] }

updateCriteria(from: string, to: string): void { patchState(this.state, (state) => ({ from, to })); } […] }

updateCriteria(from: string, to: string): void { patchState(this.state, updateRoute(from, to)); } […] } function updateRoute<T>(from: string, to: string) { return (state: T) => ({ from, to }) }

@ManfredSteyer private state = signalState({ filter: { from: 'Paris', to:
'London', }, flights: [] as Flight[], basket: {} as Record<number, boolean>, }); filter = this.state.filter(); from = this.state.filter.from(); to = this.state.filter.to();

@ManfredSteyer

@ManfredSteyer export const FlightBookingStore = signalStore( { providedIn: 'root' },
[…] );

withState({ from: 'Paris', to: 'London', […] }), […] );

withState({ from: 'Paris', to: 'London', […] }), withComputed(([…]) => ({ […] })), withMethods(([…]) => ({ })), withHooks({ […] }) );

@ManfredSteyer

@ManfredSteyer export const FlightBookingStore = signalStore( […] withMethods((state) => {
[…] return { connectCriteria: rxMethod<Criteria>((c$) => c$.pipe([…])) }; }), […] );

@ManfredSteyer export const FlightBookingStore = signalStore( […] withMethods((state) => {
[…] return { connectCriteria: rxMethod<Criteria>((c$) => c$.pipe( filter(c => c.from.length >= 3 && c.to.length >= 3), debounceTime(300), switchMap((c) => flightService.find(c.from, c.to)), tap(flights => patchState(state, { flights })) )) }; }), […] );

@ManfredSteyer export const FlightBookingStore = signalStore( […] withHooks({ onInit({ connectCriteria,
criteria }) { connectCriteria(criteria); }, }), ); takes: Signal<T>, Observable<T>, T

@ManfredSteyer

withState({ from: 'Paris', to: 'London', […] }), withSignals(([…]) => ({ […] })), withMethods(([…]) => ({ })), withHooks({ […] }), withCallState() );

@ManfredSteyer

@ManfredSteyer const BooksStore = signalStore( withEntities<Book>({ collection: 'book' }), withEntities<Author>({
collection: 'author' }) );

@ManfredSteyer const BooksStore = signalStore( withLoadEntities<Book>(BookService), withLoadEntities<Author>(AuthorService), );

@ManfredSteyer Free eBook (5th Edition) ANGULARarchitects.io/book Module Federation & Nx

@ManfredSteyer Services + Signals NGRX NGRX Signal Store Different Flavors
rxMethod Custom Features

@ManfredSteyer d Slides & Examples Remote Company Workshops and Consulting
http://angulararchitects.io

Angular Architectures with Signals

Angular Architectures with Signals

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