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angular-knowledge-patch

Update Angular project code to match v19-v21 API changes.

22|Updated Jan 22, 2026
Search Tags:#vitest#angular#forms#signals#ssr#hydration#zoneless
One-click install
npx skills add https://github.com/Nevaberry/nevaberry-plugins --skill angular-knowledge-patch
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: angular-knowledge-patch
Source: https://github.com/Nevaberry/nevaberry-plugins/tree/main/plugins/angular-knowledge-patch/skills/angular-knowledge-patch
Command: npx skills add https://github.com/Nevaberry/nevaberry-plugins --skill angular-knowledge-patch

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Many Angular projects drift out of sync with framework releases, causing broken patterns, deprecated API usage, and incorrect assumptions about reactivity, SSR, and testing; this Skill provides concise, curated migration guidance to align code with Angular v19 through v21 changes.

Core Features & Use Cases

  • Provides focused notes and examples for signals and reactivity, including linkedSignal, resource, and httpResource.
  • Covers signal-based forms, the new form() API, and validator patterns for safer, typed forms.
  • Explains route-level RenderMode, incremental hydration, zoneless change detection migration, Vitest testing migration, and the Angular Aria component patterns for accessibility.
  • Use case: migrate an existing v18 app to v21 by updating signal usage, switching to zoneless change detection, adopting incremental hydration, and converting tests to Vitest with minimal regressions.

Quick Start

Use the angular-knowledge-patch skill to update my Angular project to v21-compatible APIs and migration patterns focusing on signals, forms, SSR/hydration, zoneless change detection, and Vitest migration.

Frequently Asked Questions about angular-knowledge-patch

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I migrate Angular forms to the new signal-based form() API?▼

Angular signal-based forms use the new form() API to create safer, typed forms with signal reactivity. This migration replaces older reactive forms patterns by adopting signal-based validators for improved type safety and reactivity in Angular v19 through v21 applications.

What is the best way to configure zoneless change detection in Angular?▼

Zoneless change detection in Angular requires configuring specific providers to remove Zone.js dependencies. This migration updates your application to use zoneless change detection, aligning reactivity patterns with Angular v19 through v21 standards for improved application performance.

How does incremental hydration work with route-level RenderMode in Angular SSR?▼

Incremental hydration in Angular SSR uses route-level RenderMode to control server-side rendering behavior and selectively hydrate components. This approach reduces initial JavaScript payload and improves load times by deferring component hydration until needed.

Can I use linkedSignal, resource, and httpResource for Angular state management?▼

linkedSignal, resource, and httpResource are Angular signals APIs for managing reactive state and asynchronous data fetching. They enable linked reactive computations and resource-based data loading, replacing older patterns for HTTP and state management in Angular v19 and later.

How do I migrate Angular tests to Vitest?▼

Vitest migration for Angular involves converting existing test configurations and specs to use the Vitest test runner. This process updates testing frameworks to align with Angular v19 through v21 migration patterns, ensuring minimal regressions during the testing transition.

Does this Angular migration guidance cover accessibility and Aria component patterns?▼

Angular Aria guidance and component patterns for accessibility are included in the migration scope. This ensures applications migrating to Angular v19 through v21 adopt correct accessibility practices alongside signals, SSR, and zoneless change detection updates.

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