page-active/dist/index.js

Check and listen to all page visibility changes.

import { PageActiveObservable } from './page-active.observable.js';
const pageActiveObservable = new PageActiveObservable();
/**
 * Listen to changes in page activation.
 *
 * @returns A callback used to remove the listener.
 */
export function listenToPageActivation(
/** If true, the callback will immediately be fired with whatever the current value is. */
fireImmediately, 
/** This listener will be called any time the page activation changes. */
listener) {
    return pageActiveObservable.listen(fireImmediately, listener);
}
/** Check if the current page is currently active. */
export function isPageActive() {
    return pageActiveObservable.value;
}