/**
 * The KeyboardEvent is passed into all event callbacks from the {@link Keyboard}. It corresponds
 * to a key press or release.
 *
 * @category Input
 */
export class KeyboardEvent {
    /**
     * Create a new KeyboardEvent.
     *
     * @param {import('./keyboard.js').Keyboard} keyboard - The keyboard object which is firing the
     * event.
     * @param {globalThis.KeyboardEvent} event - The original browser event that was fired.
     * @example
     * const onKeyDown = function (e) {
     *     if (e.key === pc.KEY_SPACE) {
     *         // space key pressed
     *     }
     *     e.event.preventDefault(); // Use original browser event to prevent browser action.
     * };
     * app.keyboard.on("keydown", onKeyDown, this);
     */
    constructor(keyboard: import("./keyboard.js").Keyboard, event: globalThis.KeyboardEvent);
    /**
     * The keyCode of the key that has changed. See the KEY_* constants.
     *
     * @type {number|null}
     */
    key: number | null;
    /**
     * The element that fired the keyboard event.
     *
     * @type {Element|null}
     */
    element: Element | null;
    /**
     * The original browser event which was fired.
     *
     * @type {globalThis.KeyboardEvent|null}
     */
    event: globalThis.KeyboardEvent | null;
}