import type { VNode } from 'vue';
import type { IDefinePlugin, ExternalParam } from '../types/index';
/**
 * Check the integrity of the url
 * @param url isURL
 */
export declare function isURL(url: string): boolean;
/**
 * whether is array
 * @param value value
 */
export declare function isArray(value: unknown): value is ExternalParam[];
/**
 * whether is undefined
 * @param value value
 */
export declare function isUndefined(value: unknown): value is undefined;
/**
 * Find the first matching Node by name from a VNode list
 * @param list VNode list
 * @param name matching name
 */
export declare function findNodeByName(list: VNode[] | undefined, name: string): VNode | undefined;
/**
 * add install function for plugin
 * @param plugin the vue components and plugin
 */
export declare function withInstall<T extends {
    name: string;
}>(plugin: T): IDefinePlugin<T>;
/**
 * throw a warn
 * @param err warn message
 */
export declare function throwWarn(err: string): void;
/**
 * add a point between two parameters
 * @param first
 * @param last
 */
export declare function withPoint(first?: string, last?: string): string;