export declare enum Keys {
    arrowDown = "ArrowDown",
    arrowLeft = "ArrowLeft",
    arrowRight = "ArrowRight",
    arrowUp = "ArrowUp",
    backspace = "Backspace",
    delete = "Delete",
    enter = "Enter",
    end = "End",
    esc = "Escape",
    home = "Home",
    tab = "Tab",
    space = " "
}
export declare function appendEventKey(str: string, key: string): string;