import type { ElementState, MaskitoOptions, SelectionRange } from '../../types';
export declare class MaskModel implements ElementState {
    private readonly maskOptions;
    private readonly unmaskInitialState;
    value: string;
    selection: SelectionRange;
    constructor(initialElementState: ElementState, maskOptions: Required<MaskitoOptions>);
    addCharacters(newCharacters: string): void;
    deleteCharacters(): void;
    private getMaskExpression;
}