I think most people reading this article probably know what the word “interactivity” means in general. The problem is, in recent years the word has been given a technical meaning (e.g. in the metric “Time to Interactive” or TTI), and unfortunately the specifics of that meaning are rarely explained.
So in this article I want to dig into the meaning of interactivity on the web. After all, I think it’s one of the most important things developers need to care about.