import * as i0 from "@angular/core";
import { OnChanges, OnDestroy, SimpleChanges } from "@angular/core";
export declare class CustomDeferredLiveRegionAnnouncement implements OnChanges, OnDestroy {
  private static readonly DEFAULT_ANNOUNCEMENT_DELAY_MS;
  private readonly injector;
  private timeoutId;
  private browserRendered;
  private _announcementDelayMs;
  protected readonly renderedMessage: import("@angular/core").WritableSignal<string>;
  message: string;
  role: 'status' | 'alert';
  /**
   * Sets the announcement delay in milliseconds.
   *
   * @throws Error when the value is negative or not finite.
   */
  set announcementDelayMs(value: number);
  /**
   * Schedules the initial announcement after the first browser render so the
   * live region is present and empty before its content changes.
   */
  private scheduleInitialAnnouncement;
  /**
   * Clears any pending announcement and the current live-region content before
   * scheduling the latest message using the configured delay.
   *
   * Stores the timer in `timeoutId` so it can be cancelled if the message or
   * delay changes before the announcement occurs.
   */
  private scheduleAnnouncement;
  /**
   * Cancels the currently pending announcement, if any, and clears the stored
   * timer reference.
   */
  private clearPendingAnnouncement;
  /**
   * Returns the configured announcement delay in milliseconds.
   */
  get announcementDelayMs(): number;
  /**
   * Responds to announcement-related input changes.
   *
   * Message changes schedule an announcement, using a browser-only post-render
   * callback before the component's first browser render. Delay changes only
   * reschedule an announcement when one is already pending.
   */
  ngOnChanges(changes: SimpleChanges): void;
  /**
   * Cancels any pending announcement when the component is destroyed.
   */
  ngOnDestroy(): void;
  static ɵfac: i0.ɵɵFactoryDeclaration<CustomDeferredLiveRegionAnnouncement, never>;
  static ɵcmp: i0.ɵɵComponentDeclaration<CustomDeferredLiveRegionAnnouncement, "opal-lib-custom-deferred-live-region-announcement", never, {
    "message": {
      "alias": "message";
      "required": true;
    };
    "role": {
      "alias": "role";
      "required": false;
    };
    "announcementDelayMs": {
      "alias": "announcementDelayMs";
      "required": false;
    };
  }, {}, never, never, true, never>;
}