import { Injector } from '@angular/core';
/**
 * Represent options available when opening new modal windows.
 */
export interface NgbModalOptions {
    /**
     * Sets the aria attribute aria-labelledby to a modal window.
     *
     * @since 2.2.0
     */
    ariaLabelledBy?: string;
    /**
     * Whether a backdrop element should be created for a given modal (true by default).
     * Alternatively, specify 'static' for a backdrop which doesn't close the modal on click.
     */
    backdrop?: boolean | 'static';
    /**
     * Function called when a modal will be dismissed.
     * If this function returns false, the promise is resolved with false or the promise is rejected, the modal is not
     * dismissed.
     */
    beforeDismiss?: () => boolean | Promise<boolean>;
    /**
     * To center the modal vertically (false by default).
     *
     * @since 1.1.0
     */
    centered?: boolean;
    /**
     * An element to which to attach newly opened modal windows.
     */
    container?: string;
    /**
     * Injector to use for modal content.
     */
    injector?: Injector;
    /**
     * Whether to close the modal when escape key is pressed (true by default).
     */
    keyboard?: boolean;
    /**
     * Size of a new modal window.
     */
    size?: 'sm' | 'lg';
    /**
     * Custom class to append to the modal window
     */
    windowClass?: string;
    /**
     * Custom class to append to the modal backdrop
     *
     * @since 1.1.0
     */
    backdropClass?: string;
}
/**
* Configuration object token for the NgbModal service.
* You can provide this configuration, typically in your root module in order to provide default option values for every
* modal.
*
* @since 3.1.0
*/
export declare class NgbModalConfig implements NgbModalOptions {
    backdrop: boolean | 'static';
    keyboard: boolean;
}