/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { InjectionToken } from '@angular/core';
import { FocusTrap } from './focus-trap';
/** The injection token used to specify the inert strategy. */
export declare const FOCUS_TRAP_INERT_STRATEGY: InjectionToken<FocusTrapInertStrategy>;
/**
 * A strategy that dictates how FocusTrap should prevent elements
 * outside of the FocusTrap from being focused.
 */
export interface FocusTrapInertStrategy {
    /** Makes all elements outside focusTrap unfocusable. */
    preventFocus(focusTrap: FocusTrap): void;
    /** Reverts elements made unfocusable by preventFocus to their previous state. */
    allowFocus(focusTrap: FocusTrap): void;
}