export type LoadScriptOptions = Partial<HTMLScriptElement>;
export type LoadCSSOptions = Partial<HTMLLinkElement>;
/**
 * opt.async defaults to `true`.
 * No other options are set by default.
 */
export declare function loadScript(src: string, opt?: LoadScriptOptions): Promise<void>;
/**
 * Default options:
 * rel: 'stylesheet'
 *
 * No other options are set by default.
 */
export declare function loadCSS(href: string, opt?: LoadCSSOptions): Promise<void>;