Angular Component Standards

# Angular Component Standards
## Core Principles
### 1. Single Responsibility Principle
* Each component should have a single, well-defined responsibility.
* Avoid mixing multiple, unrelated functionalities in a single component.

### 2. Separation of Concerns
* Keep presentation logic separate from business logic.
* Use services to handle complex business logic and API interactions.

### 3. Reusability
* Design components to be reusable across the application.
* Avoid tightly coupling components to specific use cases.

## Code Style Guidelines
### 1. Naming Conventions
* Component names should be in PascalCase (e.g., `UserListComponent`).
* Component file names should match the component name (e.g., `user-list.component.ts`).
* Use descriptive and concise names for variables, functions, and properties.

### 2. Typing
* Use type annotations for all variables, function parameters, and return types.
* Use interfaces to define complex data structures and API response types.
* Avoid using the `any` type whenever possible.

### 3. File Structure
* Keep component files organized in a logical directory structure (e.g., `components/user-list`).
* Use a consistent naming convention for component files (e.g., `user-list.component.ts`, `user-list.component.html`, `user-list.component.css`).

## Best Practices
### 1. Component Lifecycle Hooks
* Use lifecycle hooks (e.g., `ngOnInit`, `ngOnDestroy`) to handle component initialization and cleanup.
* Avoid using the constructor for complex initialization logic.

### 2. Data Binding
* Use two-way data binding (e.g., `[(ngModel)]`) for form inputs and other interactive elements.
* Use one-way data binding (e.g., `{{ }}`) for displaying read-only data.

### 3. Services and Dependency Injection
* Use services to handle API interactions, data storage, and other complex logic.
* Inject services into components using the `@Injectable` decorator.

### 4. Error Handling
* Use try-catch blocks to handle errors in component code.
* Display user-friendly error messages to the user.

## Common Pitfalls to Avoid
### 1. Overusing the `any` Type
* Avoid using the `any` type as a crutch for poor typing or lack of type definitions.

### 2. Tight Coupling
* Avoid tightly coupling components to specific services or APIs.
* Use interfaces and dependency injection to decouple components from specific implementations.

### 3. Complex Component Templates
* Avoid complex, deeply nested templates.
* Use child components or other templating strategies to simplify complex templates.

### 4. Unused Imports
* Remove unused imports from component files.
* Use tools like `npm run lint` to detect and remove unused imports.

### 5. Unhandled Async Operations
* Always handle async operations (e.g., promises, observables) in component code.
* Use try-catch blocks and error handling mechanisms to handle async errors.