Better Angular Architectures: Architectures with Standalone Components @DWX2022

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@ManfredSteyer Better Angular Architectures: Architectures with Standalone Components

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@ManfredSteyer

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@ManfredSteyer

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@ManfredSteyer

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@ManfredSteyer

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@ManfredSteyer Angular 2 BETA, Feb 2016 @Component({ selector: 'app', directives: [ROUTER_DIRECTIVES, MyComponent, NgIf, NgFor], templateUrl: 'app/app.html' }) @RouteConfig([ { path: '/', component: Home, … }, { path: '/voucher', component: Voucher, … }, ]) export class App { […] }

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@ManfredSteyer Angular 2 RC.5, August 2016 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 {}

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@ManfredSteyer My Ivy Talk at ng-conf 2020

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

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@ManfredSteyer bootstrapApplication(AppComponent);

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@ManfredSteyer

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@ManfredSteyer #1 Mental Model #2 Compatibility #3 Routing #4 Architecture

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@ManfredSteyer Manfred Steyer

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@ManfredSteyer

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@ManfredSteyer Standalone Component = Component + NgModule (not implemented that way!)

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@ManfredSteyer @Component({ standalone: true, selector: 'app-root', imports: [ RouterModule, HomeComponent, AboutComponent, ], templateUrl: '…' }) export class AppComponent { […] } @NgModule({ imports: [ RouterModule, HomeComponentModule, AboutComponentModule, ], declares: [ AppComponent ] }) export class AppModule { … } @Component({ selector: 'app-root', templateUrl: '…' }) export class AppComponent { […] }

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@ManfredSteyer @Pipe({ standalone: true, name: 'city', pure: true }) export class CityPipe implements PipeTransform { […] }

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@ManfredSteyer @Directive({ standalone: true, selector: 'input[appCity]', providers: [ … ] }) export class CityValidator implements Validator { […] }

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

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@ManfredSteyer

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@ManfredSteyer It looks like you want to use NgIfDirective and MyComponent. Shall I import it for you?

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

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

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

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

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

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

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

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

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@ManfredSteyer export const APP_ROUTES: Routes = [ […], { path: 'flight-booking', loadChildren: () => import('@nx-example/booking/feature-book') .then(m => m.FLIGHT_BOOKING_ROUTES) }, { path: 'next-flight', loadComponent: () => import('@nx-example/booking/feature-tickets') .then(m => m.NextFlightComponent) }, ];

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@ManfredSteyer export const FLIGHT_BOOKING_ROUTES: Routes = [{ path: '', component: FlightBookingComponent, providers: [ MyService ], children: [ […] ] }];

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@ManfredSteyer export const FLIGHT_BOOKING_ROUTES: Routes = [{ path: '', component: FlightBookingComponent, providers: [ MyService ], children: [ […] ] }]; (Lazily) loaded with route config Scope: This route + all child routes

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@ManfredSteyer export const FLIGHT_BOOKING_ROUTES: Routes = [{ path: '', component: FlightBookingComponent, providers: [ ...configureMyLibrary() ], children: [ […] ] }];

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@ManfredSteyer // index.ts == Public API export * from './flight-booking.component'; export * from './flight-card/flight-card.component';

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@ManfredSteyer import * as booking from './booking'; […] @Component({ standalone: true, imports: [ booking, […] ], […] }) export class MyComponent { […] } Wish List

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@ManfredSteyer "paths": { "@demo/data": ["src/app/data/index.ts"], "@demo/shared": ["src/app/shared/index.ts"], "@demo/shell": ["src/app/shell/index.ts"], "@demo/booking": ["src/app/booking/index.ts"] }

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@ManfredSteyer import * as booking from '@demo/booking'; […] @Component({ standalone: true, imports: [ ...Object.values(booking) as any[], […] ], […] }) export class MyComponent { […] }

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@ManfredSteyer

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@ManfredSteyer + Generates path mappings + Generates initial barrel + Prevents bypassing index.ts + much more

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@ManfredSteyer Booking Boarding Shared Feature Feature Feature Feature Feature UI UI UI UI UI UI UI UI UI Domain Domain Domain Domain Domain Domain Util Util Util Util Util Util @ManfredSteyer

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

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@ManfredSteyer

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@ManfredSteyer Lib A Lib B index.ts Comp1 Comp2 Today (with NgModules) NgModule Comp3 NgModule

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@ManfredSteyer Lib A Lib B index.ts Comp1 Comp2 Tomorrow (without NgModules) Comp3

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@ManfredSteyer Conclusion Mental Model Folders & Barrels Mapped Paths Nx, Libs, and Constraints FTW!

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@ManfredSteyer 2022

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