import * as i0 from '@angular/core';
import { OnDestroy, NgZone, OnChanges, EventEmitter, ElementRef, SimpleChanges } from '@angular/core';

interface ResizeObserverBoxSize {
    blockSize: number;
    inlineSize: number;
}
type ResizeObserverCallback = (resizes: ResizeObserverEntry[], observer: ResizeObserver) => void;
interface ResizeObserverConfig {
    box?: 'content-box' | 'border-box';
}
type ResizeObserverServiceCallback = (resize: ResizeObserverEntry) => void;
declare class NgxResizeObserverService implements OnDestroy {
    private readonly ngZone;
    private count;
    private elementMap;
    private observer;
    constructor(ngZone: NgZone);
    ngOnDestroy(): void;
    observe(element: Element, callback: ResizeObserverServiceCallback, boxModel: string): void;
    unobserve(element: Element): void;
    private clearObserver;
    static ɵfac: i0.ɵɵFactoryDeclaration<NgxResizeObserverService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<NgxResizeObserverService>;
}

declare class NgxResizeObserverDirective implements OnChanges, OnDestroy {
    private readonly elementRef;
    private readonly ngxResizeObserverService;
    private readonly ngZone;
    resizeBoxModel: string;
    onResize: EventEmitter<ResizeObserverEntry>;
    private observing;
    constructor(elementRef: ElementRef, ngxResizeObserverService: NgxResizeObserverService, ngZone: NgZone);
    ngOnChanges(changes: SimpleChanges): void;
    ngOnDestroy(): void;
    private observe;
    private unobserve;
    static ɵfac: i0.ɵɵFactoryDeclaration<NgxResizeObserverDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<NgxResizeObserverDirective, "[onResize]", never, { "resizeBoxModel": { "alias": "resizeBoxModel"; "required": false; }; }, { "onResize": "onResize"; }, never, never, true, never>;
}

declare class NgxResizeObserverModule {
    static ɵfac: i0.ɵɵFactoryDeclaration<NgxResizeObserverModule, never>;
    static ɵmod: i0.ɵɵNgModuleDeclaration<NgxResizeObserverModule, never, [typeof NgxResizeObserverDirective], [typeof NgxResizeObserverDirective]>;
    static ɵinj: i0.ɵɵInjectorDeclaration<NgxResizeObserverModule>;
}

export { NgxResizeObserverDirective, NgxResizeObserverModule, NgxResizeObserverService };
export type { ResizeObserverBoxSize, ResizeObserverCallback, ResizeObserverConfig, ResizeObserverServiceCallback };