import Diff from './base';
import { CallbackOption, ChangeObject, DiffCallback, DiffWordsOptions } from '../types';
declare class WordDiff extends Diff<string, string> {
    protected equals(left: string, right: string, options: DiffWordsOptions): boolean;
    protected tokenize(value: string, options?: DiffWordsOptions): string[];
    protected join(tokens: any): any;
    protected postProcess(changes: any, options: any): any;
}
export declare const wordDiff: WordDiff;
export declare function diffWords(oldStr: string, newStr: string, options: (DiffWordsOptions & CallbackOption<string>) | DiffCallback<string>): undefined;
export declare function diffWords(oldStr: string, newStr: string, options: DiffWordsOptions): ChangeObject<string>[];
declare class WordsWithSpaceDiff extends Diff<string, string> {
    protected tokenize(value: string): RegExpMatchArray | [];
}
export declare const wordsWithSpaceDiff: WordsWithSpaceDiff;
export declare function diffWordsWithSpace(oldStr: string, newStr: string, options: (DiffWordsOptions & CallbackOption<string>) | DiffCallback<string>): undefined;
export declare function diffWordsWithSpace(oldStr: string, newStr: string, options: DiffWordsOptions): ChangeObject<string>[];
export {};