/**
 * @description - handlebars link expression
 * @author - huang.jian <hjj491229492@hotmail.com>
 */
/**
 * @typedef {object} LinkNode
 *
 * @property {string} [href]
 * @property {string} [rel]
 */
/**
 * @typedef {object} ScriptNode
 *
 * @property {string} [src]
 * @property {boolean} [async]
 * @property {boolean} [defer]
 * @property {boolean} [crossorigin]
 */
import { SafeString } from 'handlebars';
import { LinkNode, ScriptNode } from './constant';
/**
 * @param {LinkNode|ScriptNode} resource
 *
 * @return {SafeString|string}
 */
export declare function link(resource?: ScriptNode | LinkNode | string): SafeString | string;