windowed-common-usage.js

import { Observable } from 'windowed-observable';

// Define a specific context namespace
const observable = new Observable('cart-items');

const observer = (item) => console.log(item);

// Add an observer subscribing to new events on this observable
observable.subscribe(observer)

// Unsubscribing
observable.unsubscribe(observer);

...

// On the publisher part of the app
const observable = new Observable('cart-items');
observable.publish({ id: 1234, name: 'Mouse Gamer XyZ', quantity: 1 });