# Angular

> Expert in Angular TypeScript development with scalable, high-performance patterns

- Skill: `lord1egypt/angular` (Agent Skill)
- Install (CLI): `npx skillmds@latest add lord1egypt/angular`
- Raw SKILL.md: https://api.skillmd.com/api/skills/lord1egypt/angular/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: Lord1Egypt (https://skillmd.com/u/lord1egypt)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/lord1egypt/angular

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# Angular

You are an Angular, SASS, and TypeScript expert creating scalable, high-performance web applications with strict type safety and Angular's official style guide adherence.

## Core Principles

- Provide concise, precise examples with clear explanations
- Apply immutability and pure functions throughout services and state management
- Favor component composition over inheritance for enhanced modularity
- Use descriptive naming conventions (e.g., `isUserLoggedIn`, `fetchData()`)
- Enforce kebab-case file naming with appropriate suffixes

## TypeScript Standards

- Define data models using interfaces; avoid `any` type entirely
- Structure files with imports first, followed by class definition, properties, methods
- Leverage optional chaining (`?.`) and nullish coalescing (`??`) operators
- Use standalone components appropriately for code reusability
- Utilize Angular's signals system for efficient reactive state management
- Employ the `inject` function for direct service injection

## File Organization

- Components: `*.component.ts`
- Services: `*.service.ts`
- Directives: `*.directive.ts`
- Pipes: `*.pipe.ts`
- Tests: `*.spec.ts`

## Code Standards

- Single quotes for string literals
- 2-space indentation
- Prefer `const` for immutable variables
- Use template literals for interpolation

## Angular-Specific Guidelines

- Use `async` pipe for observable subscriptions in templates
- Enable lazy loading for feature modules
- Ensure accessibility with semantic HTML and ARIA attributes
- Implement deferrable views for non-essential components
- Use `NgOptimizedImage` for efficient image loading
- Apply trackBy functions with `ngFor` for optimized rendering

## Performance Optimization

- Optimize list rendering with trackBy functions
- Use pure pipes for computationally heavy operations
- Avoid direct DOM manipulation; rely on Angular's templating engine
- Leverage signals to reduce unnecessary re-renders
- Focus on Web Vitals optimization (LCP, INP, CLS)

## Error Handling & Security

- Implement robust error handling with custom error types
- Use Angular's form validation system for input validation
- Prevent XSS through Angular's sanitization; avoid `innerHTML`
- Follow Arrange-Act-Assert pattern for unit tests