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- import * as i0 from '@angular/core';
- import { OnDestroy } from '@angular/core';
- import { Observable } from 'rxjs';
- /**
- * Allows observing resize events on multiple elements using a shared set of ResizeObserver.
- * Sharing a ResizeObserver instance is recommended for better performance (see
- * https://github.com/WICG/resize-observer/issues/59).
- *
- * Rather than share a single `ResizeObserver`, this class creates one `ResizeObserver` per type
- * of observed box ('content-box', 'border-box', and 'device-pixel-content-box'). This avoids
- * later calls to `observe` with a different box type from influencing the events dispatched to
- * earlier calls.
- */
- declare class SharedResizeObserver implements OnDestroy {
- private _cleanupErrorListener;
- /** Map of box type to shared resize observer. */
- private _observers;
- /** The Angular zone. */
- private _ngZone;
- constructor();
- ngOnDestroy(): void;
- /**
- * Gets a stream of resize events for the given target element and box type.
- * @param target The element to observe for resizes.
- * @param options Options to pass to the `ResizeObserver`
- * @return The stream of resize events for the element.
- */
- observe(target: Element, options?: ResizeObserverOptions): Observable<ResizeObserverEntry[]>;
- static ɵfac: i0.ɵɵFactoryDeclaration<SharedResizeObserver, never>;
- static ɵprov: i0.ɵɵInjectableDeclaration<SharedResizeObserver>;
- }
- export { SharedResizeObserver };
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