I’m curious as to what approach you’re taking with the tooltips. Data attributes (with content: attr) or an additional element.

Also, I wonder if some improvements could be made in the way of how/when the chat window destroys chat-lines. When reading in real-time it’ll max out and start deleting old entities, but if you’re scrolled up to read a previous message this deletion stops. If you’ve left your chat position at that point for a while, it just continues to render the new chat markup indefinitely, potentially creating an obscene amount of objects.