Fix Angular dependency injection, change detection, RxJS subscriptions, memory leaks, performance issues, and production Angular problems
Subscriptions to observables are never unsubscribed, causing memory leaks when component is destroyed.
Component re-renders on every change detection cycle because OnPush strategy is not used.
Two services inject each other, causing circular dependency error at runtime.
Global error handling is missing, causing unhandled errors to break the app.
Multiple async pipes in template create multiple subscriptions, causing performance issues.
Dynamic form controls added at runtime don't trigger validation properly.
CanActivate guard allows navigation even when condition fails.
Component doesn't update after async operation because change detection isn't triggered.
ActivatedRoute params subscription is never unsubscribed, causing memory leaks.
Change detection runs too frequently due to Zone.js patching, causing performance issues.
Form validation doesn't trigger because validators are not properly configured.
HTTP interceptor doesn't add headers because it's not properly registered or order is wrong.
Route guard allows navigation when it should block, causing unauthorized access.
Service is provided in component instead of root, creating multiple instances.
Component input doesn't update because OnPush change detection is used without proper updates.
Route resolver doesn't load data, causing component to render with undefined data.
Lazy loaded module doesn't load because route configuration is incorrect.
ViewChild is undefined in ngOnInit because view is not initialized yet.
FormArray changes don't reflect in template because change detection isn't triggered.
HTTP errors are not caught, causing unhandled errors and poor UX.
Directive doesn't apply styles because host binding or renderer is not used correctly.
CanDeactivate guard doesn't prevent navigation when form has unsaved changes.
Pipe doesn't update when input data changes because it's not pure or change detection issue.
Service state is not shared because service is provided at component level instead of root.
Animation doesn't trigger because trigger name or state doesn't match.
ng-content doesn't project content because selector doesn't match or projection is incorrect.
Dynamically created component doesn't render because ViewContainerRef or ComponentFactory is not used correctly.
Route data is undefined because resolver didn't run or data access is incorrect.