interface HTMLExpandElement extends HTMLElement {
    _initialStyle?: {
        overflow: string;
        width: string;
        height: string;
    };
}
declare function expand(vertical?: boolean): {
    onBeforeEnter: (el: HTMLExpandElement) => void;
    onEnter: (el: HTMLExpandElement) => void;
    onAfterEnter: (el: HTMLExpandElement) => void;
    onEnterCancelled: (el: HTMLExpandElement) => void;
    onBeforeLeave: (el: HTMLExpandElement) => void;
    onLeave: (el: HTMLExpandElement) => void;
    onAfterLeave: (el: HTMLExpandElement) => void;
    onLeaveCancelled: (el: HTMLExpandElement) => void;
};
export default expand;