Socket.io custom client ID

Question

I\'m making a chat app with socket.io, and I\'d like to use my custom client id, instead of the default ones (8411473621394412707, 1120516437992682114

Answer 1

Can store customId (example userId) in object format instead of for loop, this will improve performance during connection, disconnect and retrieving socketId for emitting

`

 var userId_SocketId_KeyPair = {};
 var socketId_UserId_KeyPair = {};

_io.on('connection', (socket) => {
    console.log('Client connected');
    //On socket disconnect
    socket.on('disconnect', () => {
        // Removing sockets
        let socketId = socket.id;
        let userId = socketId_UserId_KeyPair[socketId];
        delete socketId_UserId_KeyPair[socketId];
        if (userId != undefined) {
            delete userId_SocketId_KeyPair[userId];
        }
        console.log("onDisconnect deleted socket with userId :" + "\nUserId,socketId :" + userId + "," + socketId);
    });

    //Store client info
    socket.on('storeClientInfo', function (data) {
        let jsonObject = JSON.parse(data);
        let userId = jsonObject.userId;
        let socketId = socket.id;
        userId_SocketId_KeyPair[userId] = socketId;
        socketId_UserId_KeyPair[socketId] = userId;
        console.log("storeClientInfo called with :" + data + "\nUserId,socketId :" + userId + "," + socketId);
    });
`