import Diff from './base';
import { CallbackOption, DiffCallback, ChangeObject, DiffCharsOptions } from '../types';
declare class CharacterDiff extends Diff<string, string> {
}
export declare const characterDiff: CharacterDiff;
export declare function diffChars(oldStr: string, newStr: string, options: (DiffCharsOptions & CallbackOption<string>) | DiffCallback<string>): undefined;
export declare function diffChars(oldStr: string, newStr: string, options: DiffCharsOptions): ChangeObject<string>[];
export {};