Angular 21 development with signals, standalone components, reactive patterns, and strict TypeScript typing.

• Use standalone components with ChangeDetectionStrategy.OnPush, input()/output() functions, and computed() for derived state instead of decorators and ngClass/ngStyle
• Manage async data with resource() for signal-based fetching, handling loading/error states via hasValue() and status checks
• Build templates with native control flow (@if, @for, @switch), async pipes, and avoid arrow functions or template logic
• Inject services with inject() function, implement lazy loading for routes, and use Tailwind 4.1 for styling
• Ensure WCAG AA accessibility compliance including focus management, color contrast, and ARIA attributes