![]() With Socket.IO, you'd know (almost) instantly about conceding a goal. Socket.IO allows the server to push information to the client in real time, when events occur on the server.įor example, if you were playing a multiplayer game, an event could be your "friend" scoring a spectacular goal against you. How to Add the Socket.io Disconnect Event Listener.How to Remove a User from a Socket.io Room.How to Display the Last 100 Messages on the Client.How to Allow Users to Send Messages to Each Other with Socket.io. ![]() How to Set Up HarperDB Environment Variables.How to Create the Send Message Component (C).How to Create a Schema and Table in HarperDB.How to Create the Messages Component (B).How to Create our First Socket.io Event Listener on the Server.Here is the source code (remember to give it a star ⭐). Realtime communication: Socket.io (see below!).HarperDB also has a built-in API, saving us from having to write a lot of backend code) Database: HarperDB (a data + application platform that allows you to query data using either SQL or NoSQL.Backend: Node and Express (Express is very popular NodeJS framework that allows us to easily create APIs and backends).Frontend: React (A frontend JavaScript framework for building interactive applications).Here's what we'll be using to build this app: ![]() ![]() The app that we'll be building will have two pages: But using Socket.io, the server is able to push real time information to the client about some events that happened on the server. Normally, using HTTP requests, the server cannot push data to the client in real time. This will be a great project to learn how to put together fullstack apps, and how to create an app where the backend can communicate with the frontend in real time. In this article, we will be using Socket.io and HarperDB to build a fullstack, real-time chat application with chat rooms.
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