export declare type IData = IDb | string;
export interface IDb {
    [field: string]: string | number | boolean | null | undefined;
}
export default class DropdownSelect extends HTMLElement {
    private dom;
    private slim_select;
    private ready;
    constructor();
    open(): Promise<void>;
    close(): Promise<void>;
    disable(): Promise<void>;
    enable(): Promise<void>;
    render(): Promise<void>;
    set_data(data: IData[]): Promise<void>;
    get_selected(): Promise<false | {
        [x: string]: string;
        value: string;
    }[] | {
        [x: string]: string;
        value: string;
    }>;
    set_selected(data: string[] | string): Promise<void>;
    add_data(data: IData[]): Promise<void>;
    private del_data;
    private initialize;
}