node-y-websocket - 1.4.5-4+deb12u1 main

The Websocket Provider implements a classical client server
model. Clients connect to a single endpoint over Websocket. The
server distributes awareness information and document updates among
clients.
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The Websocket Provider is a solid choice if you want a central source
that handles authentication and authorization. Websockets also send
header information and cookies, so you can use existing
authentication mechanisms with this server.
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Node.js is an event-based server-side JavaScript engine.