import { type MarkedCallback } from './shared';
export type MarkedDefaultValue = string | number;
/**
 * Defaults payload definition.
 */
export type Defaults = MarkedCallback & {
    /**
     * Set to 0 to disable automatic refresh of open preview windows.
     */
    refresh?: 0 | 1;
    [setting: string]: MarkedDefaultValue | undefined;
};
/**
 * Set Marked user Settings.
 *
 * @param payload Defaults payload.
 * @returns Marked defaults URL.
 * @example
 * defaults({ syntaxHighlight: 1, includeMathJax: 0 })
 * // => 'x-marked://defaults?syntaxHighlight=1&includeMathJax=0'
 * @link https://marked2app.com/help/URL_Handler.html#defaults
 */
export declare function defaults(payload?: Defaults): string;