import type { Optional } from '../../core/helpers/utilityTypes.js';
type JSONContent = {
    [key: string]: any;
    type?: string | undefined;
    attrs?: Record<string, any> | undefined;
    content?: JSONContent[];
    marks?: {
        type: string;
        attrs?: Record<string, any>;
        [key: string]: any;
    }[];
    text?: string;
};
/**
 * Check whether a doc is empty
 */
export declare function isDocEmpty(doc: JSONContent | null | undefined): boolean;
/**
 * Convert document to a basic string without all of the formatting, HTML tags, attributes etc.
 * Useful for previews or text analysis.
 * @param stopAtLength If set, will stop further parsing when the resulting string length
 * reaches this length. Useful when you're only interested in the first few characters of the document.
 */
export declare function documentToBasicString(doc: JSONContent | null | undefined, stopAtLength?: Optional<number>): string;
/**
 * Build a rich text document out of a basic string
 */
export declare function convertBasicStringToDocument(text: string): JSONContent;
export {};
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