/**
 * Indicates the index of the tab panel.
 */
export declare const index = "data-index";
/**
 * Indicates the direction of the activation (based on the previous active tab).
 * @type {'left' | 'right' | 'up' | 'down' | 'none'}
 */
export declare const activationDirection = "data-activation-direction";
/**
 * Indicates the orientation of the tabs.
 * @type {'horizontal' | 'vertical'}
 */
export declare const orientation = "data-orientation";
/**
 * Present when the panel is hidden.
 */
export declare const hidden = "data-hidden";
/**
 * Present when the panel begins animating in.
 */
export declare const startingStyle = "data-starting-style";
/**
 * Present when the panel is animating out.
 */
export declare const endingStyle = "data-ending-style";