import { HastNode } from "./hast";
export declare function mergeSpanElementsWithSameAttributes(node: HastNode): void;
export declare function mergeTexts(node: HastNode): void;
export declare function removeLetterSpacingStyleAttributes(html: string): string;
export declare function removeEmptyStyleAttributes(html: string): string;
export declare function removeStyleElements(node: HastNode): void;
export declare function replaceSpanElementsContainingOnlySpacesWithTexts(node: HastNode): void;
export declare function replaceSpanElementsWithoutPropertiesWithTexts(node: HastNode): void;