import { ChangeDetectorRef, ElementRef, NgZone } from '@angular/core';
import * as i0 from "@angular/core";
export declare class ObserveResizeService {
    private _ngZone;
    private _targets;
    private _observedElements;
    constructor(_ngZone: NgZone);
    private _resizeObserver;
    private windowResizeObserver;
    /**
     * Registers the component on which media queries need to be calculated.
     *
     * ```ts
     * @Component({ selector: 'app-parent', template: '<app-child></app-child>' })
     * class ParentComponent {}
     *
     * @Component({ selector: 'app-child' })
     * class ChildComponent {
     *   @MediaQuery('app-parent:(max-width: 20rem)') @HostBinding('class.parentSmall') parentSmall = false;
     *   @MediaQuery('(max-width: 20rem)') @HostBinding('class.childSmall') childSmall = false;
     *
     *   constructor(
     *     resize: ObserveResizeService,
     *     elementRef: ElementRef,
     *     changeDetector: ChangeDetectorRef
     *   ) {
     *     resize.register(this, elementRef, changeDetector);
     *   }
     * }
     * ```
     *
     * @param instance the current component instance (this)
     * @param injector the Injector of the current component
     */
    register(instance: any, elementRef: ElementRef, changeDetector: ChangeDetectorRef): void;
    private _remove;
    private _removeElementsWithoutListeners;
    private _getRulesForElement;
    private _entrySize;
    private _unobserve;
    private _observe;
    static ɵfac: i0.ɵɵFactoryDeclaration<ObserveResizeService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ObserveResizeService>;
}