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If we want to add realtime tracking of which users are online, we can use active websocket connections through ActionCable to keep track.
Stimulus Reflex is one of the coolest new libraries out there. It can update the browser in realtime and allow you to build reactive applications without any Javascript. It's awesome.
An updated version of our Group Chat series using Webpacker, ActionCable, Stimulus.js, and modern Javascript to build a very clean version of realtime group chat in Rails
Keeping track of a user's last read timestamp for each chat room is straightforward, especially when we use Stimulus.js to update it from the client side.
It's important to see that there are unread messages in channels you're not actively viewing. We can use a very simple event in ActionCable to do this and bold channel names with unread messages.
User mentions in group chat is a crucial feature, so this week we're taking a look at how to add @ mentions for our users in chat with regex and more.
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