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API > @angular/forms

AsyncValidatorFn

      
      interface AsyncValidatorFn {
  (control: AbstractControl): Promise<ValidationErrors | null> | Observable<ValidationErrors | null>
}

Methods

call signature

(control: AbstractControl): Promise<ValidationErrors | null> | Observable<ValidationErrors | null>
      
      (control: AbstractControl): Promise<ValidationErrors | null> | Observable<ValidationErrors | null>

Parameters

control

Type: AbstractControl.

Returns

Promise<ValidationErrors | null> | Observable<ValidationErrors | null>