import type { PropertyValues } from 'lit';
export type StylesheetLoader = () => Promise<{
    default: CSSStyleSheet;
}>;
export interface SyncStylesOptions {
    unstyled?: boolean;
}
export declare function createComponentStyles(componentTag: string, defaultLoad: StylesheetLoader): {
    sync: (renderRoot: Element | DocumentFragment, options?: SyncStylesOptions) => Promise<void>;
    preload: () => Promise<CSSStyleSheet>;
};
export declare function syncStylesWhen(changed: PropertyValues, key: PropertyKey, sync: () => void | Promise<void>): void;
//# sourceMappingURL=sync-stylesheet.d.ts.map