import { LitElement, PropertyValues } from 'lit';
import { I18nStrings } from '@blueprintui/components/internals';
import { CheckboxFormControlMixin } from '@blueprintui/components/forms';
declare const BpButtonExpand_base: typeof LitElement & CheckboxFormControlMixin;
/**
 * ```typescript
 * import '@blueprintui/components/include/button-expand.js';
 * ```
 *
 * ```html
 * <bp-button-expand expanded></bp-button-expand>
 * ```
 *
 * @summary The expand button component is used to reveal and hide additional content, such as a dropdown menu or a nested list.
 * @element bp-button-expand
 * @since 1.0.0
 * @slot - slot for custom bp-icon
 * @cssprop --animation-duration
 * @event {InputEvent} input - occurs when the value changes
 * @event {InputEvent} change - occurs when the value changes
 */
export declare class BpButtonExpand extends BpButtonExpand_base {
    #private;
    /** Controls the icon direction based on expand context, either vertical (down/right) or horizontal (left/right) */
    accessor orientation: 'vertical' | 'horizontal';
    /** Provides internationalization strings for accessibility labels and screen reader announcements */
    accessor i18n: I18nStrings['actions'];
    static formAssociated: boolean;
    static styles: CSSStyleSheet[];
    render(): import("lit").TemplateResult<1>;
    firstUpdated(props: PropertyValues<this>): void;
}
export {};