node-sockjs-client - 1.6.1+dfsg1-2 main

SockJS-client is a browser JavaScript library that provides a WebSocket-like
object. SockJS gives you a coherent, cross-browser, Javascript API which
creates a low latency, full duplex, cross-domain communication channel between
the browser and the web server.
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Under the hood SockJS tries to use native WebSockets first. If that fails it
can use a variety of browser-specific transport protocols and presents them
through WebSocket-like abstractions.
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SockJS is intended to work for all modern browsers and in environments which
don't support the WebSocket protocol -- for example, behind restrictive
corporate proxies.
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Node.js is an event-based server-side JavaScript engine.