In this episode, we dive into handling joining and leaving events on a presence channel. We start by setting up listeners for two important events—when a user joins and when a user leaves the channel. This allows us to keep the list of users who are present in real-time perfectly up to date!
We first implement the 'joining' event, checking out how to add new users to our list as they connect. There's a quick reminder to make sure we aren't accidentally adding users who are already present by checking before we push them to the array.
Next, we set up the 'leaving' event, which triggers whenever someone exits the channel. Here, we filter our user list to remove anyone who has just left, ensuring the list stays accurate for everyone.
You'll see live in the browser how the user list updates as people come and go, and you'll get to test it out by refreshing pages and seeing the changes in action. By the end of this episode, your app will be able to respond to real-time presence changes smoothly!