A step-by-step guide to implementing the ControlValueAccessor interface in Angular to make custom components work with ngModel and formControl. Covers all four required methods (writeValue, registerOnChange, registerOnTouched, setDisabledState), how to set up the NG_VALUE_ACCESSOR provider with forwardRef, handling change detection with ChangeDetectorRef, and accessing form control errors via Angular's DI system using @Self and @Optional decorators.
Sort: