import { ElementRef } from "@angular/core";
export declare const focusableElementsCSSSelector = "[tabindex], button, a, input:not([type=hidden])";
interface ITabNavigationService {
    disableTabNavigation(domElRef: ElementRef): void;
    restoreTabNavigation(): void;
}
export declare class TabNavigationService implements ITabNavigationService {
    private tabFocusableElements;
    disableTabNavigation(domElRef: ElementRef): void;
    restoreTabNavigation(): void;
}
export {};
