/**
 * Removes leading and trailing whitespace or specified characters from `string`.
 *
 * @since 5.6.0
 * @category String
 * @param str The string to trim.
 * @param chars The characters to trim.
 * @returns Returns the trimmed string.
 * @see [[trimEnd]],[[trimStart]]
 * @example
 *
 * ```js
 * trim('  abc  ')
 * // => 'abc'
 *
 * trim('-_-abc-_-', '_-')
 * // => 'abc'
 * ```
 */
export declare function trim(str: string, chars: string, guard?: any): string;
export default trim;