AsyncValidatorFn

interface

npm Package	@angular/forms
Module	`import { AsyncValidatorFn } from '@angular/forms';`
Source	forms/src/directives/validators.ts

Interface Overview

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

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