import type { PluginOption, IndexHtmlTransformContext } from "vite";
import type { Notebook } from "../lib/notebook.js";
/**
 * A function which performs a per-page transformation of the template HTML.
 *
 * @param source The source of the template (typically HTML).
 * @param context The Vite plugin context.
 * @returns The transformed template source HTML.
 */
export type TemplateTransform = (source: string, context: IndexHtmlTransformContext) => string | Promise<string>;
/**
 * A function which transforms the parsed notebook.
 *
 * @param notebook The current (parsed) notebook.
 * @param context The Vite plugin context.
 * @returns The transformed notebook.
 */
export type NotebookTransform = (notebook: Notebook, context: IndexHtmlTransformContext) => Notebook | Promise<Notebook>;
export interface ObservableOptions {
    /** The global window, for the default parser implementations. */
    window?: Pick<typeof globalThis, "DOMParser">;
    /** The parser implementation; defaults to `new window.DOMParser()`. */
    parser?: DOMParser;
    /** The path to the page template; defaults to the default template. */
    template?: string;
    /** An optional function which transforms the template HTML for the current page. */
    transformTemplate?: TemplateTransform;
    /** An optional function which transforms the notebook for the current page. */
    transformNotebook?: NotebookTransform;
}
export declare function observable({ window, parser, template, transformTemplate, transformNotebook }?: ObservableOptions): PluginOption;