import type { Editor } from '../externals.js';
import { UmbTiptapToolbarElementApiBase } from './tiptap-toolbar-element-api-base.js';
/**
 * Base class for `actionButton` kind toolbar extensions.
 *
 * Provides a default `isDisabled` implementation that returns `!isActive(editor)`,
 * meaning the button is disabled when the action cannot be performed.
 *
 * Extensions using this base class should override `isActive` to return whether the
 * action can be executed in the current editor state.
 */
export declare abstract class UmbTiptapToolbarActionButtonApiBase extends UmbTiptapToolbarElementApiBase {
    isDisabled: (editor?: Editor) => boolean;
}