nextjs socket.io

1. Install the necessary packages by running the following command in your terminal:

npm install socket.io next

1. Create a new file called server.js in the root of your Next.js project and add the following code to it:

const { createServer } = require("http");
const { Server } = require("socket.io");

export default (req, res) => {
  if (!res.socket.server.io) {
    // This is the first time a client has connected to this server
    const httpServer = createServer(req, res);
    const io = new Server(httpServer, {
      / options /
    });
    res.socket.server.io = io;

    io.on("connection", (socket) => {
      console.log("a user connected");
      socket.on("disconnect", () => {
        console.log("user disconnected");
      });
    });
  } else {
    // If the server already has an instance of socket.io, use that
    console.log("server.io already exists");
  }
  res.end();
};

1. In your Next.js pages, you can now use the socket.io client to communicate with the server. For example:

import io from "socket.io-client";

const socket = io();

socket.on("connect", () => {
  console.log("connected to server");
});

socket.on("disconnect", () => {
  console.log("disconnected from server");
});

1. You can now use the socket object to send and receive messages between the client and the server using socket.io.