Technology: AngularJS

Introduction

The Angular team consistently focuses on improving performance and enhancing key features with each new release. It’s always exciting to see how these updates aim to make the framework more powerful and robust. The same happened in version 20, which is designed to provide faster rendering, enhance developer productivity, and offer advanced reactivity, while also simplifying legacy patterns to embrace the future of modern web development. These improvements position Angular as a leading contender for the best web development framework in 2025.

🔥 What’s New in Angular 20?

1. Signals: Now Fully Stable and Ready for Production

The Angular team consistently focuses on improving performance and enhancing key features with each new release. It’s always exciting to see how these updates aim to make the framework more powerful and robust. The same happened in version 20, which is designed to provide faster rendering, enhance developer productivity, and offer advanced reactivity, while also simplifying legacy patterns to embrace the future of modern web development. These improvements position Angular as a leading contender for the best web development framework in 2025.

Here is the list of Signal APIs that are fully stable.

• signal() – Create a writable signal which is a reactive value container. You can update its state by calling .set() and .update() methods.

• computed() – Create a derived signal whose value automatically gets recalculated when its dependencies change.
  

• effect() – Register a side effect that triggers when the value of the signal changes.
  

• toSignal() – Converts Rxjs observable to signal.
  

• model() – Signal based two-way binding to simplify communication between two components.

• viewChild() / contentChild() – Signal based template queries

• toObservable() – Convert angular signal to Rxjs observable
  

• afterRenderEffect() – Registers an effect that executes only after Angular has finished rendering the DOM.
  

• linkedSignal() – Create a signal whose value is both derived from one or more source signals and directly upgradable.

• afterNextSignal() – Register a callback that runs after every next render cycle, but only one time.

🧪 Experimental Signal APIs:
      There are some experimental APIs too, which might get fully stable in upcoming versions.

• resource() – This API is to manage async operations.
  

• rxResource() – treaming versions of resource API, supporting real-time update via Rxjs-like pattern
  

• httpResource() – Signal-powered HTTP request, built on HttpClient

• Signal-based Forms – This is available for preview in this version.

2. Zoneless Change Detection

In version 20 of Angular introduced the Zoneless feature. This is something very powerful change that no one is talking about. Till now, Angular relied on Zone.js to track changes, which sometimes bottlenecks the app’s performance because the change detection keeps triggering for every small change. Zoneless change detection is now in developer preview, offering leaner and faster execution. Now the developer can decide when the zone should trigger. This may seem similar to the OnPush strategy but it’s totally different than OnPush.

How to use zoneless mode:

• Remove zone.js from angular.json polyfills.

• Add provideZonelessChangeDetection() to app.config.ts.

• For new projects, use the –zoneless flag during setup.

Zoneless is a developer preview but offers great potential for performance-critical applications.

3. Modernized control flow syntax: @if, @for and @switch

The modern template syntax introduced in Angular 17 is now the preferred and more stable approach in v20. The classic structural directives (*ngIf, *ngFor, *ngSwitch) are now deprecated.

Code Example:

4. Dynamic Component Creation

The dynamic component creation is now improved and gives support for two-way binding, directive, input and output bindings. This makes dynamic component creation easier and faster. Using the createComponent method, you can create a dynamic component.

Here is a simple example,

5. Improved Template Expressions

In Angular 20, the team significantly tried to close the gap between Angular’s template syntax and standard JavaScript/TypeScript, making the template more expressive and powerful. Below are the key improvements.

• Exponentiation Operator (**)  – You can now use the ** operator for power calculation.
  Example,

  <input type=“number” [(ngModel)]=“base” placeholder=“Base” /> <input type=“number” [(ngModel)]=“exponent” placeholder=“Exponent” /> <p>Result: {{ base() ** exponent() }}</p>

• “in” Operator – The angular now supports JavaScript in operator to check if a key exists in the object.
  Example,

  <input [(ngModel)]=“propertyName” placeholder=“Property name” /> <p>   “{{ propertyName() }}” exists in circle object: {{ propertyName() in circle }} </p>

• (Un)tagged Template literals – Its now possible to write backticks in HTML and even create a custom function.Example,
  

  <p>{{ `Hello, ${userName}!` }}</p>

• Void Operator – The void operator ensures that the function always returns undefined. This is particularly useful in event binding.Example,
  

  <button (click)=“void saveData()”>Save</button>

• Operator Precedence Diagnostics – Angular 20 introduces diagnostics for unparenthesized nullish coalescing (??) mixed with logical AND (&&) or OR (||) to prevent ambiguous expressions.
  Example,

  <!– Previously ambiguous –> {{ name || user?.name ?? ‘Anonymous’ }} <!– Diagnostic now recommends: –> {{ name || (user?.name ?? ‘Anonymous’) }}

6. Incremental Hydration for Server-Side Rendering (SSR)

Server-side rendering just got smarter with Incremental Hydration. Instead of hydrating the full DOM serially, Angular 20 enables granular hydration: only the necessary components are hydrated based on user interaction or visibility. This dramatically improves Time to Interactive and overall page speed, vital for SEO and user engagement. This helps to improve the page speed of an Angular app.

7.Router Enhancements

In Angular 20, the team has introduced several router enhancements focusing more on flexibility and security.

Below are the key updates: 

• Standalone Routing API via provideRouter()
  
  You can now configure the routing in standalone component without the need for RouterModule. Use the provideRouter function in app’s boostrapApplication.

• Async Redirects support
  
  The redirectTo property now allows async observables and promises. This helps router to make async decisions such as checking permission or checking the token.

• Smarter Route Guard and Resolving
  
  Gaurds can now be composed with runSerially(..) – letting you run multiple guards in order for given routes

• Improved Tree Shaking and Optional Features
  
  With provideRouter, only the router features you actually use are included in your build. Previously with RouterModule, features like HashLocationStrategy, preloading and Scroll management were always bundled – even if its unused.
  Example,

  import { provideRouter, withPreloading, PreloadAllModules } from ‘@angular/router’; bootstrapApplication(AppComponent, {   providers: [     provideRouter(routes, withPreloading(PreloadAllModules))   ] })

8. Native Scroll Improvements

Native scroll behaviors are now supported better and configure directly through router. 

Example: 

Programmatically control scroll with options:

Deprecations in Angular 20

There are some deprecations done in new version. Below are the major deprecations which you need to know.

1) Structural Directive: *ngIf, *ngFor and *ngSwitch

The classic Angular directives ngIf, ngFor and ngSwitch are now deprecated. Developer need to use the template syntax from now onwards

2) Zone.jsrelated APIs

APIs and Flags related to zone.js and experimental change detection are either renamed or not in use anymore

3) Testing Utilities:

• TestBed.get() → Removed (deprecated since v9). Use TestBed.inject().

• InjectFlags enum → Removed.

• fixture.autoDetectChanges(true/false)/code> → The boolean parameter is deprecated/removed. Use without argument for auto detection.

• ng-reflect-* → attributes — Not generated by default in dev mode. Can be re-enabled with provideNgReflectAttributes() for debugging.

• The DOCUMENT token → Moved from @angular/common to @angular/core imports auto-migrated.

• HammerJS → Legacy support deprecated due to lack of maintenance.

Conclusion

From the Angular team, you can always expect improvements and a better development experience in their updates. This time also the team has also proved it why Angular is still the first choice for enterprise solutions. The major update in my opinion, is the Signal enhancements. 

Please share your thoughts on this. What feature do you like the most in this update?