/**
 * --------------------------------------------------------------------------
 * NJ: dropdown.ts
 * --------------------------------------------------------------------------
 */
import AbstractComponent from '../../globals/ts/abstract-component';
export default class SelectInput extends AbstractComponent {
    static readonly NAME = "nj-form-item--custom-list";
    protected static readonly DATA_KEY = "nj.custom-list";
    protected static readonly EVENT_KEY: string;
    private static readonly ESCAPE_KEYCODE;
    private static readonly ENTER_KEYCODE;
    private static readonly UP_KEYCODE;
    private static readonly DOWN_KEYCODE;
    private static readonly CLASS_NAME;
    private static readonly ATTRIBUTE;
    protected static readonly SELECTOR: {
        default: string;
        label: string;
        button: string;
        input: string;
        options: string;
        option: string;
    };
    private static readonly EVENT;
    static getInstance(element: HTMLElement): SelectInput;
    static init(options?: {}): SelectInput[];
    private buttonEl;
    private labelEl;
    private listEl;
    private inputEl;
    private optionElements;
    constructor(element: HTMLElement);
    /**
     * Update optionElements list and its listeners
     */
    updateOptionsAndListeners(): void;
    get isOpen(): boolean;
    set isOpen(value: boolean);
    /**
     * Index of the option element corresponding to the current field value.
     */
    private get selectedIndex();
    private set selectedIndex(value);
    /**
     * Index of the currently focused option.
     */
    private get focusedIndex();
    private set focusedIndex(value);
    /** Current label of the field */
    private get selectedOptionLabel();
    /** Current value of the field */
    private get selectedOptionValue();
    dispose(): void;
    private addToggleEvent;
    private addEscapeEvent;
    private addBlurEvent;
    /**
     * Navigate between options and set `focusedIndex`
     */
    private addUpDownEvent;
    /**
     * Select option on Click or Enter keydown and close menu
     */
    private addClickEvent;
    /**
     * Select first option whose first letter is
     * matching the alphanumeric value of keycode
     */
    private addShortcutEvents;
}