export declare class MaskingBase {
    private oldLength;
    private oldValue;
    private caretPos;
    _mask: string;
    _slotChar: string;
    _showPlaceholder: boolean;
    _input: any;
    value: string;
    focus: boolean;
    _overwriteOnInsert: boolean;
    private clear;
    private static isNumeric;
    private static isAlpha;
    checkValue(onFocus?: boolean): void;
    private isInputKeyAcceptable;
    private getConstChars;
    maskValue(): void;
    removeMask(value: string): string;
    updateInput(): void;
    private getUpdatedCaretPos;
    private fillWithPlaceholder;
    blurEvent(): void;
    getCaretPos(): any;
}