/**
 * Set meaningful aria properties to trigger elements that are connected to
 * overlay elements such as menus and dialogs.
 */
export declare function setAriaOverlayTriggerProperties(overlay: HTMLElement, trigger: HTMLElement, popupType: 'menu' | 'dialog', state: string): void;
/**
 * Reset trigger element aria properties.
 */
export declare function removeAriaOverlayTriggerProperties(trigger: HTMLElement | null | undefined): void;
/**
 * Add meaningful aria attributes to trigger element of role='combobox'
 */
export declare function setAriaComboBoxAttributes(trigger: HTMLElement, overlayId: string, expanded: boolean, hasPopup?: 'listbox' | 'grid'): void;
/**
 * Remove aria attributes from trigger elements.
 */
export declare function removeAriaComboBoxAttributes(trigger?: HTMLElement | null): void;
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