export interface IDropdownItemOption {
    value: string;
    text: string;
    title?: string;
    icon?: string;
    [key: string]: any;
}
export declare abstract class DropdownBase {
    private static openedDropdowns;
    protected className: string;
    protected dropdownOpenedClass: string;
    protected itemClassSelected: string;
    protected dropdownElement: HTMLDivElement;
    protected dropdownHeader: HTMLDivElement;
    protected dropdownList: HTMLUListElement;
    protected dropdownContainer: HTMLDivElement;
    protected optionItems: IDropdownItemOption[];
    protected currentFocusIndex: number;
    protected handleClickOutsideRef: (event: MouseEvent) => void;
    constructor(defaultClassName: string);
    get isOpen(): boolean;
    render(): HTMLDivElement;
    protected createDropdownElement(): HTMLDivElement;
    protected createList(): HTMLUListElement;
    protected createContainer(): HTMLDivElement;
    protected createArrow(arrowClassName?: string): HTMLDivElement;
    protected showPopup(): void;
    protected hidePopup(): void;
    private closeOtherOpenedDropdowns;
    protected focusItem(index: number, updateAriaSelected?: boolean): void;
    protected updateOptions(): void;
    protected createOptionItem(option: IDropdownItemOption): HTMLLIElement;
    protected handleOptionClick(e: MouseEvent, option: IDropdownItemOption, dropdownItem: HTMLLIElement): void;
    protected handleKeyDown(e: KeyboardEvent): void;
    protected handleClickOutside(event: MouseEvent): void;
    protected bindEvents(): void;
    protected handleHeaderClick(e: MouseEvent): void;
    protected onBeforePopupShow(): void;
    protected onOpenedByKeyboard(): void;
    protected onDropdownOpened(): void;
    protected updateItemSelection(): void;
    protected updateOption(option: IDropdownItemOption, item: HTMLLIElement): void;
    protected shouldUpdateAriaSelectedOnFocus(): boolean;
    protected abstract createHeader(): HTMLDivElement;
    protected abstract getOptions(): IDropdownItemOption[];
    protected abstract isOptionSelected(option: IDropdownItemOption): boolean;
    protected abstract onOptionSelect(option: IDropdownItemOption, dropdownItem: HTMLLIElement): void;
    protected abstract updateSelect(): void;
    protected abstract attachMethodsToElement(): void;
}