How React Works

React runs all the code for all of my components. Anytime some state might have changed, then I imagine React deleting everything that it added to the screen and replacing it with the new output from my React components. Yep, conceptually, that's exactly how React works. So basically, I don't need to do anything to actually tell the browser what updates to make when the user interacts with my calendar. Yes, exactly. And that is what makes React React.