Angular 14 vs Angular 20 

Comparison Table

Feature	Angular 14 (Old)	Angular 20 (New)	Example
Strictly Typed Forms	Introduced typed forms (FormControl<string>)	Matured and fully stable	ts\nconst name = new FormControl<string>('');
Standalone Components	Introduced (experimental)	Default way to build apps (no need NgModule)	ts\n@Component({ standalone: true })\nexport class HomeComponent {}\n
NgModules	Still mandatory for most apps	Optional (can mix with standalone)	Old: @NgModule({ declarations: [...] }) New: bootstrapApplication(AppComponent)
Signals	❌ Not available	✅ Core feature (reactivity model replacing heavy RxJS usage in components)	ts\nconst count = signal(0);\ncount.set(count() + 1);\n
Zoneless Change Detection	❌ Only Zone.js	✅ Zone.js optional (can run Angular without it, using signals + manual triggers)	ts\nbootstrapApplication(App, { providers: [provideZoneChangeDetection({ eventCoalescing: true })] })
SSR & Hydration	Limited, experimental	First-class: @angular/ssr with full hydration support	bash\nng add @angular/ssr
Build Tooling	Webpack only	ESBuild + Vite support → faster builds & dev server	bash\nng serve --configuration vite
RxJS	Version 7	Version 8 (with smaller, functional APIs)	Old: of(1).pipe(map(x => x+1)) New: map(of(1), x => x+1)
Router Enhancements	Basic lazy loading	Deferrable views (@defer) for lazy-loading parts of templates	html\n@defer (on viewport)\n <chat-widget />\n@placeholder Loading... @end
CLI	Standard commands	Smarter: auto-converts to standalone, better defaults, faster	bash\nng generate component home --standalone
Material	Angular Material v14 (legacy APIs)	Material 3 (MDC-based, theming, typography, dynamic colors)	html\n<mat-button color="tertiary">New Color</mat-button>
Dependency Injection	Traditional	Injection contexts, inject() API everywhere (not only in constructors)	ts\nconst router = inject(Router);\n

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✅ In short:

• Angular 14 = still module-heavy, no signals, slower builds.

• Angular 20 = standalone-first, signals (new reactivity), zoneless change detection, Vite/ESBuild, better SSR, Material 3.