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Before implementing new functionality, check if Angular already provides a suitable utility, service, or pattern that can be reused. This promotes consistency across the codebase, reduces duplication, and follows established Angular conventions.

Key areas to check:

• Services and utilities: Use existing services like Clipboard service instead of implementing custom clipboard functionality
• API patterns: Follow established patterns like using ng global APIs for devtools functionality rather than creating new approaches
• Injection tokens: Use factory functions in injection tokens with default implementations instead of separate providers
• Built-in functions: Reuse existing functions like retrieveTransferredState() instead of reimplementing similar logic

Example of good practice:

// Instead of custom clipboard implementation
async copyToClipboard(text: string) {
  await navigator.clipboard.writeText(text);
}

// Use Angular's Clipboard service
constructor(private clipboard = inject(Clipboard)) {}
copyToClipboard(text: string) {
  this.clipboard.copy(text);
}

// Instead of separate provider
export const WINDOW_PROVIDER: Provider = {
  provide: WINDOW,
  useValue: window,
};

// Use factory in token definition
export const WINDOW = new InjectionToken<Window>('WINDOW', {
  factory: () => window,
});

This approach ensures better maintainability, leverages Angular’s built-in optimizations, and provides a more consistent developer experience.