How to Build a Chat App
Creator: Hannat Salami August 24, 2026What You'll Learn
- Establish bi-directional client-server communication using native WebSockets and Socket.io
- Configure an Express HTTP server to manage persistent WebSocket connections
- Emit and broadcast custom real-time events across connected clients
- Implement typing indicators and real-time user activity detection
- Assemble a complete multi-user chat application with instant message delivery
About This Course
In this course, you will build a real-time messaging application from scratch using WebSockets, Socket.io, and Node.js. You will transition from standard HTTP request-response patterns to persistent, bi-directional communication channels that send and receive data instantly. Throughout the modules, you will integrate Socket.io with an Express server, track live user activity, and display dynamic typing indicators. By the end, you will have built a functional multi-user chat application and acquired the core patterns needed to add real-time features to any web project.
Who this is for: This course is built for intermediate web developers looking to master real-time data flow. You should have a working familiarity with modern JavaScript, basic Node.js, and Express.
Modules
01: Introduction to WebSockets
19 min
02: Socket.io Fundamentals
22 min
03: Express Server Integration
11 min
04: Building Complete Chat Application
60 min
01: Introduction to WebSockets
19 min
02: Socket.io Fundamentals
22 min
03: Express Server Integration
11 min
04: Building Complete Chat Application
60 min
Final Quiz
Covers all 4 modules. Pass with 80% or higher to complete the course.
New To YouVersity?
This course is built from real YouTube videos, structured into modules with quizzes and progress tracking. Original creators keep every view and every ad dollar — courses just send them focused, motivated viewers.
- Structured modules
- Free to enrol
- Progress saved across devices
- Quizzes after each section
Ready To Start?
Begin the first module now. No credit card needed
Before You Decide
Playlists don't have quizzes, don't track progress, don't pull videos from multiple channels into a sequence, and don't give you a certificate. A playlist is a list. This is a course.
The videos are still free. What costs money is the structure around them: modules in the right order, quizzes built from the content, progress that follows you across devices, and a certificate at the end. You could piece all of that together yourself. Or you could have it built in minutes.
They're yours. Permanently. Every certificate you earned stays dated, valid, and shareable whether you're still subscribed or not. Cancelling doesn't touch anything you've already completed.
Install it from the Chrome Web Store. When you're on any YouTube video, click the YouVersity icon to save it to your library. Once you've saved enough, turn your library into a structured course. It's a second way to create courses: instead of typing a topic, you hand-pick the videos yourself.
The opposite. Videos stay embedded on YouTube. Every view in a course is a real view on their channel with their ads. We send them focused, motivated viewers who actually watch to the end. Creators keep everything they already earn, plus new traffic.
Probably not. Most people take two or three. At $9 a month, even one course is worth it compared to buying individually. The 30 is a ceiling, not a homework assignment.
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