Angular Architectures with Signals

Transcript

1. @ManfredSteyer ManfredSteyer Angular Architectures with Signals
2. @ManfredSteyer Signal as Producer 4711 Consumer read set notify 4712
3. @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>
4. @ManfredSteyer Simple Reactive Building Block Fine-grained CD Zone-less CD Interop with RxJS No need to unsubscribe
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11. @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); } }
12. @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); } }
13. @ManfredSteyer @Injectable({ providedIn: 'root' }) export class FlightBookingFacade { […] 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(); […] }
14. @ManfredSteyer @Injectable({ providedIn: 'root' }) export class FlightBookingFacade { […] private state = signal({ from: 'Hamburg', to: 'Graz', flights: [] as Flight[], […] }); […] }
15. @ManfredSteyer @Injectable({ providedIn: 'root' }) export class FlightBookingFacade { […] 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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18. @ManfredSteyer select(selector) selectSignal(selector)
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22. @ManfredSteyer @Injectable({ providedIn: 'root' }) export class FlightBookingFacade { private state = signalState({ from: 'Paris', to: 'London', flights: [] as Flight[], basket: {} as Record<number, boolean>, }); flights = this.state.flights; from = this.state.from; […] }
23. @ManfredSteyer @Injectable({ providedIn: 'root' }) export class FlightBookingFacade { […] selected = computed( () => this.flights().filter((f) => this.basket()[f.id]) ); […] }
24. @ManfredSteyer @Injectable({ providedIn: 'root' }) export class FlightBookingFacade { […] updateCriteria(from: string, to: string): void { patchState(this.state, { from, to }) } […] }
25. @ManfredSteyer @Injectable({ providedIn: 'root' }) export class FlightBookingFacade { […] updateCriteria(from: string, to: string): void { patchState(this.state, (state) => ({ from, to })); } […] }
26. @ManfredSteyer @Injectable({ providedIn: 'root' }) export class FlightBookingFacade { […] updateCriteria(from: string, to: string): void { patchState(this.state, updateRoute(from, to)); } […] } function updateRoute<T>(from: string, to: string) { return (state: T) => ({ from, to }) }
27. @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();
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30. @ManfredSteyer export const FlightBookingStore = signalStore( { providedIn: 'root' }, […] );
31. @ManfredSteyer export const FlightBookingStore = signalStore( { providedIn: 'root' }, withState({ from: 'Paris', to: 'London', […] }), […] );
32. @ManfredSteyer export const FlightBookingStore = signalStore( { providedIn: 'root' }, withState({ from: 'Paris', to: 'London', […] }), withComputed(([…]) => ({ […] })), withMethods(([…]) => ({ })), withHooks({ […] }) );
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35. @ManfredSteyer export const FlightBookingStore = signalStore( […] withMethods((state) => { […] return { connectCriteria: rxMethod<Criteria>((c$) => c$.pipe([…])) }; }), […] );
36. @ManfredSteyer export const FlightBookingStore = signalStore( […] withMethods((state) => { […] return { connectCriteria: rxMethod<Criteria>((c$) => c$.pipe([…])) }; }), […] );
37. @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 })) )) }; }), […] );
38. @ManfredSteyer export const FlightBookingStore = signalStore( […] withHooks({ onInit({ connectCriteria, criteria }) { connectCriteria(criteria); }, }), ); takes: Signal<T>, Observable<T>, T
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41. @ManfredSteyer export const FlightBookingStore = signalStore( { providedIn: 'root' }, withState({ from: 'Paris', to: 'London', […] }), withSignals(([…]) => ({ […] })), withMethods(([…]) => ({ })), withHooks({ […] }), withCallState() );
42. @ManfredSteyer export const FlightBookingStore = signalStore( { providedIn: 'root' }, withState({ from: 'Paris', to: 'London', […] }), withSignals(([…]) => ({ […] })), withMethods(([…]) => ({ })), withHooks({ […] }), withCallState() );
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45. @ManfredSteyer const BooksStore = signalStore( withEntities<Book>({ collection: 'book' }), withEntities<Author>({ collection: 'author' }) );
46. @ManfredSteyer const BooksStore = signalStore( withLoadEntities<Book>(BookService), withLoadEntities<Author>(AuthorService), );
47. @ManfredSteyer Free eBook (5th Edition) ANGULARarchitects.io/book Module Federation & Nx
48. @ManfredSteyer Services + Signals NGRX NGRX Signal Store Different Flavors rxMethod Custom Features
49. @ManfredSteyer d Slides & Examples Remote Company Workshops and Consulting http://angulararchitects.io