socket emit to only one user

Question

I´ve been searching for the anwser but most of them i cant quite connect with my code so im hoping to get some help.

I want to send a message for a specific user, like a chat beetween 2 people.

For example, if i choose John how can i only send a mensage to him? im having much trouble in this

app.js

io.on('connection', function (socket) { socket.on('chat', function (data) { console.log(data); //Specific user //socket.broadcast.to(socketid).emit('message', 'Hello'); }); });

I have a mongodb database so how can i specify the socketid having the user id of the select user?

ellipsis · Accepted Answer · 2019-01-11 11:19:42Z

The below code can be used to send message to a specific client. Point to be noted , every client connected has a unique socket id. Store that id in an array. You can call any user with that id.

var id=[]; io.on('connection', function (socket) { socket.on('chat', function (data) { console.log(data); id.push(${socket.id}); }); }); //to send to specific user io.to(socket#id).emit('hey!')

Adrian Preuss · Accepted Answer · 2019-01-09 18:49:08Z

You must create an userbased array. Here, you can get a special socket:

var users = []; io.on('connection', function (socket) { users.put(socket); socket.on('chat', function (data) { console.log(data); users[0].emit('chat', data); }); });

You can use a array based or an object based (here you can store it with the username, but you must implement a procedure to set the username after connection is available) variable.

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