@frshaw1/angular-visibility-api/dist/src/visibility.service.d.ts

An Angular and RxJS enabled event publisher for the browser's visibility API

import { Observable } from 'rxjs/Observable';
/**
 * VisibilityService
 *
 * An Angular service that utilizes RxJS Observables to publish events for the browsers visibility API.
 * This service abstracts the differences between browsers and makes using the visibility API seamless.
 *
 * The service exposes a single method `onVisibilityChange()` that will return an `Observable<Boolean>` that the
 * caller can subscribe to. Since the internal representation of the `Observable` is a `BehaviorSubject`, upon each
 * subscription the subscribe handler will be called immediately with the current value of the visibility observable.
 */
export declare class VisibilityService {
    private document;
    private hiddenProperty;
    private visibilityChangeEvent;
    private visibility$;
    private legacyVisibilityHandleFn;
    constructor();
    /**
     * Generates the Observable<Boolean> that callers can subscribe to for visibility events. The subscription value
     * is a {Boolean} value that indicates whether the current window IS VISIBLE.
     *
     * @return {Observable<Boolean>}
     */
    onVisibilityChange(): Observable<Boolean>;
    private initializeVisibilityParameters();
    private setupVisibilityHandler();
    private legacyVisibilityHandler(event);
}