import { MdcComponent } from '@aurelia-mdc-web/base';
import { MDCSelectHelperTextFoundation } from '@material/select';
export declare const mdcHelperTextCssClasses: {
    ROOT: string;
};
export declare class MdcSelectHelperText extends MdcComponent<MDCSelectHelperTextFoundation> {
    helperTextCssClasses: {
        HELPER_TEXT_VALIDATION_MSG: string;
        HELPER_TEXT_VALIDATION_MSG_PERSISTENT: string;
    };
    ROOT: string;
    persistent: boolean;
    validation: boolean;
    errors: string[];
    get foundationForTextField(): MDCSelectHelperTextFoundation;
    getDefaultFoundation(): MDCSelectHelperTextFoundation;
}
/** @hidden */
export interface IMdcSelectHelperTextElement extends HTMLElement {
    au: {
        controller: {
            viewModel: MdcSelectHelperText;
        };
    };
}