import { NgModel, ValidationErrors } from '@angular/forms';
import { BaseControlComponent } from '../../utils/base-control.component';
export declare class FormTextareaComponent extends BaseControlComponent {
    rows: number;
    readonly: boolean;
    minlength: number;
    maxlength: number;
    trimResult: boolean;
    minLengthErrorMessage: string;
    customTextarea: NgModel;
    private _innerValue;
    value: string;
    readonly hasMinLengthError: boolean;
    readonly invalid: boolean;
    readonly valid: boolean;
    readonly errorMessages: Array<string>;
    writeValue(value: string): void;
    validate(): ValidationErrors;
    reset(): void;
}