Realtime Chat App

Tech Stack

• JavaScript
• Node.js
• Express.js
• Socket.IO

Installation

Install npm packages:

$ npm install

Run the app with this command:

$ nodemon server.js

You may visit the application on browser with the URL: http://localhost:3000

Socket ID

Each new connection is assigned a random 20-characters identifier.
This identifier is synced with the value on the server-side.

// server-side
io.on("connection", (socket) => {
  console.log(socket.id); // x8WIv7-mJelg7on_ALbx
});

// client-side
socket.on("connect", () => {
  console.log(socket.id); // x8WIv7-mJelg7on_ALbx
});

socket.on("disconnect", () => {
  console.log(socket.id); // undefined
});