/**
 * LetterSpacingExtension — inline mark that applies letter-spacing via TextStyle.
 *
 * Commands: `setLetterSpacing(value)`, `unsetLetterSpacing()`.
 */
import { Extension } from '@tiptap/core';
export interface LetterSpacingOptions {
    types: string[];
}
declare module '@tiptap/core' {
    interface Commands<ReturnType> {
        letterSpacing: {
            setLetterSpacing: (value: string) => ReturnType;
            unsetLetterSpacing: () => ReturnType;
        };
    }
}
export declare const LetterSpacingExtension: Extension<LetterSpacingOptions, any>;
//# sourceMappingURL=letter-spacing.d.ts.map