Mastering MEAN Web Development Expert Full Stack JavaScript (Video 31)

This video tutorial explains how to configure Socket.IO in a backend Express app to emit messages when a user logs in or a new master is added. It covers setting up the Express app to work with Socket.IO, using app.locals to make the Socket.IO instance available to controllers, and emitting messages to clients. The video also demonstrates testing the setup using the Socket.IO Tester Chrome extension.

What is the purpose of configuring Socket.IO in the backend Express app?

How do we make the Socket.IO server instance available to our controllers?

What changes need to be made to export the server instead of the app instance?

Describe the process of emitting a message when a user logs in.

What precautions should be taken when using WebSocket for sending messages?

How can we test our Socket.IO setup using a Chrome extension?

What are the two types of messages that can be broadcasted to listening clients?