AngularAngular应用构建

When to Use

User needs Angular expertise — component architecture, RxJS patterns, change detection, dependency injection, routing, and forms.

Quick Reference

Common Mistakes

• - OnPush with mutated objects won't trigger change detection — always create new reference: {...obj} or INLINECODE8
• INLINECODE9 is undefined in constructor/ngOnInit — access in ngAfterViewInit or later
• INLINECODE12 without trackBy re-renders entire list on any change — add trackBy returning stable ID
• Manual subscribe() without unsubscribe leaks memory — use async pipe, takeUntilDestroyed(), or unsubscribe in INLINECODE18
• INLINECODE19 returns cold Observable — each subscribe() fires new HTTP request
• INLINECODE21/setInterval outside NgZone — change detection won't run, use NgZone.run() or signals
• Circular DI dependency crashes app — use forwardRef() or restructure services
• INLINECODE25 direct DOM access breaks SSR — use Renderer2 or INLINECODE27
• Route params via snapshot miss navigation changes — use paramMap Observable for same-component navigation
• INLINECODE30 on FormGroup requires ALL fields — use patchValue() for partial updates