Sockets have become the standard for server-to-server communication in the last few years. They are everywhere, and they are fast. As a result, there has been a surge of interest in Socket.IO, the server-side implementation of the HTML5 WebSockets API. If you have used Socket.IO with any success, then congratulations! You are ready to take your next step into the world of advanced Socket.IO development. In this tutorial, you will build a Socket.IO-based messaging application from start to finish. The application will allow users to send and receive messages via Socket.IO, and you will be able to follow along and build it from start to finish yourself.
What You Will Learn
How to Set Up Your Environment
NPM - npm is the package manager for Node.js. It allows you to download and manage libraries for Node.js apps.
Getting Started: Install Socket.IO
Make sure you have Node.js and NPM installed on your computer. Once you have those two dependencies installed, you can install Socket.IO.
Node.js users should run this command in their command line or terminal:
Install Socket.IO on Node.js
npm install socket.io