React JS: What Was the State of Web Development at Facebook?

Most of the, what React, most of Facebook developers was the service site. There was also a large client side development happening on two fonts. We had one that was early heavily inspired by a spark core on the ember. But none of them were really, there was a lot of complexity in it. So this guy called Jonah Watt, he, it was kind of fed up with that. And he figured out that it should be more like the service site rendering that he saw that we have developed for many years before. That's sort of what span, that has created the idea of React.