Modern Angular: Architectures with Standalone Components

@ManfredSteyer Modern Angular: Architectures with Standalone Components ManfredSteyer

@ManfredSteyer

@ManfredSteyer Manfred Steyer

@ManfredSteyer

@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

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

@ManfredSteyer

@ManfredSteyer Small and Medium Apps: Folder per Feature

@ManfredSteyer Medium and Large Apps: Folder per Domain

@ManfredSteyer

@ManfredSteyer → @Component({ standalone: true, selector: 'app-root', imports: [ […]
TicketsModule, ], templateUrl: '…' }) export class AppComponent { }

@ManfredSteyer → @NgModule({ imports: [ FlightCardComponent, ], declarations: [ MyTicketsComponent
], }) export class TicketsModule { }

@ManfredSteyer bootstrapApplication(AppComponent, { providers: [ MyGlobalService, importProvidersFrom(MyModule), ] });

@ManfredSteyer

@ManfredSteyer ng g @angular/core:standalone

@ManfredSteyer

@ManfredSteyer bootstrapApplication(AppComponent, { providers: [ […] ] });

@ManfredSteyer bootstrapApplication(AppComponent, { providers: [ importProvidersFrom(HttpClientModule), importProvidersFrom(RouterModule.forRoot(APP_ROUTES)), ] });

@ManfredSteyer bootstrapApplication(AppComponent, { providers: [ provideHttpClient(), provideRouter(APP_ROUTES), ] });

@ManfredSteyer bootstrapApplication(AppComponent, { providers: [ provideHttpClient( withInterceptors([authInterceptor]), ), provideRouter(APP_ROUTES, withPreloading(PreloadAllModules),
withDebugTracing(), ), ] });

@ManfredSteyer bootstrapApplication(AppComponent, { providers: [ provideLogger(loggerConfig), ] });

@ManfredSteyer bootstrapApplication(AppComponent, { providers: [ provideLogger(loggerConfig, withColor({ debug: 3 })
), ] });

@ManfredSteyer

@ManfredSteyer bootstrapApplication(AppComponent, { providers: [ provideLogger(loggerConfig, withColor({ debug: 3 })
), ] });

@ManfredSteyer export function provideLogger(config: LoggerConfig): Provider[] { […] }

@ManfredSteyer export function provideLogger(config: LoggerConfig): Provider[] { return [ LoggerService,
{ provide: LoggerConfig, useValue: config }, { provide: LogFormatter, useValue: config.formatter }, ]; }

@ManfredSteyer export function provideLogger(config: LoggerConfig): EnvironmentProviders { return makeEnvironmentProviders([ LoggerService,
{ provide: LoggerConfig, useValue: config }, { provide: LogFormatter, useValue: config.formatter }, ]); }

@ManfredSteyer export function provideLogger( config: LoggerConfig, ...featues: LoggerFeature[] ): EnvironmentProviders
{ return makeEnvironmentProviders([ LoggerService, […], features?.map(f => f.providers) ]); }

@ManfredSteyer

@ManfredSteyer export const APP_ROUTES: Routes = [ […] { path:
'flight-booking', canActivate: [() => inject(AuthService).isAuthenticated()], component: FlightBookingComponent }, ]

@ManfredSteyer export const APP_ROUTES: Routes = [ […] { path:
'flight-booking', canActivate: [() => inject(AuthService).isAuthenticated()], resolve: { flights: () => inject(FlightService).findAll() }, component: FlightBookingComponent }, ]

@ManfredSteyer export const authInterceptor: HttpInterceptorFn = (req, next) => {
[…] }

if (req.url.startsWith('https://[…]/')) { const headers = req.headers.set('Authorization', 'Bearer 12345'); req = req.clone({headers}); } […] }

if (req.url.startsWith('https://[…]/')) { const headers = req.headers.set('Authorization', 'Bearer 12345'); req = req.clone({headers}); } return next(req); }

if (req.url.startsWith('https://[…]/')) { const headers = req.headers.set('Authorization', 'Bearer 12345'); req = req.clone({headers}); } return next(req).pipe( tap(resp => console.log('response', resp)) ); }

@ManfredSteyer bootstrapApplication(AppComponent, { providers: [ provideHttpClient( withInterceptors([authInterceptor]), ), ] });

@ManfredSteyer bootstrapApplication(AppComponent, { providers: [ provideLogger({ level: LogLevel.DEBUG, appenders: [DefaultLogAppender],
formatter: (level, cat, msg) => [level, cat, msg].join(';'), }), ] });

@ManfredSteyer Free eBook (brand new) ANGULARarchitects.io/standalone-book Standalone Components Download here:

@ManfredSteyer

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

@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

@ManfredSteyer Signals!

@ManfredSteyer Signal 4711 Consumer read set notify 4712

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

@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 Signals are in an Early Stage! It will an
option; no need to update existing code!

@ManfredSteyer Fine-grained and Zone-less CD Convertible to Observables and vice
versa! No need to unsubscribe!

@ManfredSteyer Modern Angular: Lightweight Architectures Standalone Components and APIs Functional
Services Upcoming: Signals

@ManfredSteyer

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

Modern Angular: Architectures with Standalone C...

Modern Angular: Architectures with Standalone Components

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