import IHTMLCollection from '../element/IHTMLCollection';
import IHTMLOptGroupElement from '../html-opt-group-element/IHTMLOptGroupElement';
import IHTMLOptionElement from './IHTMLOptionElement';
/**
 * HTML Options Collection.
 *
 * Reference:
 * https://developer.mozilla.org/en-US/docs/Web/API/HTMLOptionsCollection.
 */
export default interface IHTMLOptionsCollection extends IHTMLCollection<IHTMLOptionElement | IHTMLOptGroupElement> {
    selectedIndex: number;
    length: number;
    /**
     * Adds new option to collection.
     *
     * @param element HTMLOptionElement or HTMLOptGroupElement to add.
     * @param before HTMLOptionElement or index number.
     */
    add(element: IHTMLOptionElement | IHTMLOptGroupElement, before?: number | IHTMLOptionElement | IHTMLOptGroupElement): void;
    /**
     * Returns option element by index.
     *
     * @param index Index.
     */
    item(index: number): IHTMLOptionElement | IHTMLOptGroupElement;
    /**
     * Removes option element from the collection.
     *
     * @param index Index.
     */
    remove(index: number): void;
}