SockJS is a browser JavaScript library that provides a WebSocket-like object.
http://sockjs.org
JavaScript Libraries and Functions · Framework
Get access to data on 58,315 websites that are SockJS Customers. We know of 7,352 live websites using SockJS and an additional 50,963 sites that used SockJS historically and 5,538 websites in the United States.
Get a list of 58,315 websites using SockJS which includes location information, hosting data, contact details, 7,352 currently live websites and an additional 82,430 domains that redirect to sites in this list. 50,963 sites that used this technology previously and 5,538 websites in the United States currently using SockJS.