Share whiteboard with other user using node.js and socket.io -

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i need idea regarding whiteboard sharing other users.suppose 1 admin user wants share whiteboard 1 user.what writing/erasing on/from whiteboard display other user.the other user can read white board.i want implement using node.js , socket.io.can give me idea or reference link how implement feature ?

it seems need room system app, http://socket.io/docs/rooms-and-namespaces/ , check docs , try integrate basic chat application firstly. if want draw whiteboard, that's area unrelated socket.io , can use canvas libraries(fabric.js seems handy library lot of demos(for requirement free-drawing demo)) creating whiteboard , can integrate whiteboard events in socket.io cleint-side ease.


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