You can open https://unnamedproject.18001767679.repl.co/ twice and look at Chrome Debug ToolsF12
, "Network"
,entry for "wss://snapmeshes.1800..."
,"Messages" tab.
Message are send between two copies of this test client. You may also run Snap! example with "UnnamedProject" as id to, see message flow.
BTW. you probably should choose some meaningful "socketid" not "UnnamedProject".
I'm not sure if socket server should store and send position of ALL registered clients at once. But record for one client only is returned by server.