Angular Standalone

You'll want it active when setting up component imports arrays, using functional providers like provideRouter and provideHttpClient, or bootstrapping apps without NgModules. It covers the migration path from traditional NgModule-based apps and includes practical patterns for lazy loading and routing. The examples are current to Angular 21, so the API guidance reflects what actually works today. Honest take: if you're still writing NgModules in new Angular projects, this will get you up to speed on the modern approach fast.