/**
 * @module indicative-rules
 */
/**
 * Returns a boolean telling if value is valid as per the given date format
 * or not.
 *
 * @example
 * ```js
 * const { is } = require('indicative')
 *
 * if (is.dateFormat('2010-11-20', ['YYYY-MM-DD'])) {
 * }
 *
 * // You can also check against multiple format to see if it matches any
 * // one or not
 * if (is.dateFormat('2010-11-20', ['YYYY-MM-DD', 'YYYY/MM/DD'])) {
 * }
 * ```
 */
export declare const dateFormat: (input: string, formats: string | string[]) => boolean;