Lightweight Architectures: With Angular's Signals and Standalone

Transcript

1. @ManfredSteyer
   Lightweight Architectures
   With Angular's Signals and Standalone
   ManfredSteyer
   

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2. @ManfredSteyer
   

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3. @ManfredSteyer
   

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4. @ManfredSteyer
   

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5. @ManfredSteyer
   

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6. @ManfredSteyer
   

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7. @ManfredSteyer
   Manfred Steyer
   

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8. @ManfredSteyer
   

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9. @ManfredSteyer
   NgModules + EcmaScript Modules
   import { NgModule } from '@angular/core';
   import { BrowserModule } from '@angular/platform-browser';
   import { AppComponent } from './app.component';
   […]
   @NgModule({
   imports: [BrowserModule, OtherModule],
   declarations: [AppComponent, OtherComponent, OtherDirective],
   providers: [],
   bootstrap: [AppComponent],
   })
   export class AppModule {}
   TypeScript Modules
   Angular Modules
   

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10. @ManfredSteyer
    @Component({
    standalone: true,
    imports: [
    […],
    FlightCardComponent,
    CityPipe,
    CityValidator,
    ],
    selector: 'flight-search',
    templateUrl: '…'
    })
    export class FlightSearchComponent {
    […]
    }
    

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11. @ManfredSteyer
    

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12. @ManfredSteyer
    Small and Medium Apps:
    Folder per Feature
    

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13. @ManfredSteyer
    Your Public APIs:
    Barrels
    // index.ts == Public API
    export *
    from './flight-booking.routes';
    

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14. @ManfredSteyer
    Medium and Large Apps:
    Folder per Domain
    

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15. @ManfredSteyer
    Restricting Access b/w Domains, etc.
    on a library basis
    

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16. @ManfredSteyer
    Restricting Access
    on a folder basis
    Tech Lead
    Rainer Hahnekamp,
    AngularArchitects
    @softarc/eslint-plugin-sheriff
    

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17. @ManfredSteyer
    

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18. @ManfredSteyer
    Free eBook
    ANGULARarchitects.io/standalone
    Standalone Components
    Download here:
    

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19. @ManfredSteyer
    

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20. @ManfredSteyer
    Zone.js:
    Monkey
    Patching
    After Event
    Handler:
    Inform Angular
    CD Checks
    Components
    all components (default)
    or selected ones (OnPush)
    

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21. @ManfredSteyer
    Zone.js:
    Magic
    Zone.js:
    ~100K
    Cannot patch
    async/await
    coarse
    grained CD
    e.g. Components are always checked as a
    whole, even if only a tiny fraction changed
    

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22. @ManfredSteyer
    Signals!
    

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23. @ManfredSteyer
    Signals!
    

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24. @ManfredSteyer
    Signal
    as Producer
    4711
    Consumer
    read
    set
    notify
    4712
    

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25. @ManfredSteyer
    flights: Flight[] = [];
    const flights = await this.flightService.findAsPromise(from, to);
    this.flights = flights;
    
    
    
    

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26. @ManfredSteyer
    flights = signal([]);
    const flights = await this.flightService.findAsPromise(from, to);
    this.flights.set(flights);
    
    
    
    

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27. @ManfredSteyer
    

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28. @ManfredSteyer
    

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

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

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31. @ManfredSteyer
    @Injectable({ providedIn: 'root' })
    export class FlightBookingFacade {
    […]
    private _flights = signal([]);
    readonly flights = this._flights.asReadonly();
    private _from = signal('Hamburg');
    readonly from = this._from.asReadonly();
    private _to = signal('Graz');
    readonly to = this._to.asReadonly();
    […]
    }
    

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32. @ManfredSteyer
    @Injectable({ providedIn: 'root' })
    export class FlightBookingFacade {
    […]
    private state = signal({
    from: 'Hamburg',
    to: 'Graz',
    flights: [] as Flight[], […]
    }, { equal });
    […]
    }
    

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33. @ManfredSteyer
    @Injectable({ providedIn: 'root' })
    export class FlightBookingFacade {
    […]
    private state = signal({
    from: 'Hamburg',
    to: 'Graz',
    flights: [] as Flight[], […]
    }, { equal });
    flights = computed(() => this.state().flights, { equal });
    from = computed(() => this.state().from, { equal });
    […]
    }
    

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34. @ManfredSteyer
    @Injectable({ providedIn: 'root' })
    export class FlightBookingFacade {
    […]
    private state = signal({
    from: 'Hamburg',
    to: 'Graz',
    flights: [] as Flight[], […]
    }, { equal });
    flights = computed(() => this.state().flights, { equal });
    from = computed(() => this.state().from, { equal });
    […]
    }
    const equal = (a,b) => a === b
    

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35. @ManfredSteyer
    

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36. @ManfredSteyer
    select(selector)
    selectSignal(selector)
    

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37. @ManfredSteyer
    

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

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39. @ManfredSteyer
    @Injectable({ providedIn: 'root' })
    export class FlightBookingFacade {
    […]
    selected = selectSignal(
    () => this.flights().filter((f) => this.basket()[f.id]);
    […]
    }
    

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40. @ManfredSteyer
    @Injectable({ providedIn: 'root' })
    export class FlightBookingFacade {
    […]
    selected2 = selectSignal(
    this.flights,
    this.basket,
    (flights, basket) => flights.filter((f) => basket[f.id])
    );
    […]
    }
    

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41. @ManfredSteyer
    @Injectable({ providedIn: 'root' })
    export class FlightBookingFacade {
    […]
    updateCriteria(from: string, to: string): void {
    this.state.$update({ from, to });
    }
    […]
    }
    

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42. @ManfredSteyer
    @Injectable({ providedIn: 'root' })
    export class FlightBookingFacade {
    […]
    updateCriteria(from: string, to: string): void {
    this.state.$update(state => ({ ...state, from, to }));
    }
    […]
    }
    

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43. @ManfredSteyer
    

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

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45. @ManfredSteyer
    export const FlightBookingStore = signalStore(
    { providedIn: 'root' },
    withState({
    from: 'Paris',
    to: 'London',
    […]
    }),
    […]
    );
    

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46. @ManfredSteyer
    export const FlightBookingStore = signalStore(
    { providedIn: 'root' },
    withState({
    from: 'Paris',
    to: 'London',
    […]
    }),
    withSignals(([…]) => ({ […] })),
    withMethods(([…]) => ({ })),
    withHooks({ […] }),
    withCallState()
    );
    

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47. @ManfredSteyer
    

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48. @ManfredSteyer
    const BooksStore = signalStore(
    withEntities({ collection: 'book' }),
    withEntities({ collection: 'author' })
    );
    

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49. @ManfredSteyer
    const BooksStore = signalStore(
    withLoadEntities(BookService),
    withLoadEntities(AuthorService),
    );
    

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50. @ManfredSteyer
    

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51. @ManfredSteyer
    

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

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