Session Replay - What Are the Engineering Challenges?

There's actually an open source like spec called the mutation observer that's supported in most modern browsers. We use that to one, get a full what we call a full snapshot of the DOM and then we also use the same API to get like diffs after the fact. And so we use that information to then do the rebuild the DOM after thefact. So if you want to do session replay, I remember talking to the log rocket people about that. There's some kind of like change, change set logging system you can do for the front end. Is that what you're doing to observe the front end and be able to replay any session? Yes, yes!