export interface LoadingProps {
    height?: number | string;
}
export interface LoadingHandle {
    start: () => void;
    finish: () => void;
    error: () => void;
    update: (percent: number) => void;
}
export default function LoadingBar({ ref, height, }: LoadingProps & {
    ref?: React.Ref<LoadingHandle>;
}): import("react").JSX.Element | null;