Function minValidator

packages/forms/src/validators.ts:470–480

(min: number)

 * See `Validators.min` for additional information.
 */
export function minValidator(min: number): ValidatorFn {
  return (control: AbstractControl): ValidationErrors | null => {
    if (control.value == null || min == null) {
      return null; // don't validate empty values to allow optional controls
    }
    const value = parseFloat(control.value);
    // Controls with NaN values after parsing should be treated as not having a
    // minimum, per the HTML forms spec: https://www.w3.org/TR/html5/forms.html#attr-input-min
    return !isNaN(value) && value < min ? {'min': {'min': min, 'actual': control.value}} : null;
  };
}

/**
 * Validator that requires the control's value to be less than or equal to the provided number.