Angular DI Deep Dive: InjectionToken, @Optional, Multi-Providers, and the Resolution Algorithm [2026]
Lesson 1.7 of the Angular tutorial — DI deep dive: InjectionToken
Dependency Injection
Angular Dependency Injection Explained: inject(), Providers, and the Root Injector [2026]
Lesson 1.3 of the Angular tutorial — dependency injection from the consumer side: the inject() function, injection contexts, the hierarchical injector lookup, and providedIn:’root’ as the everyday default.
Angular Bootstrap and ApplicationConfig: The provideX() Ecosystem [2026]
Lesson 1.6 of the Angular tutorial — bootstrapApplication(), ApplicationConfig, and the full provideX() ecosystem: provideRouter, provideHttpClient, provideAnimationsAsync, provideClientHydration, custom providers, and SSR config merging.
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