Browser-based React was relatively quiet in 2016. Version 15.0 was released in April, the only such major upgrade, though there were consistent minor updates throughout the year. In 2017, we’ll start to hear more about React Fiber, which is described as an “ongoing reimplementation of React’s core algorithm”. Dan Abramov says that “there is still quite a bit of work to do”, but that it should land in version 16.0 or 17.0 of React.
Much of the React team’s work is on getting Fiber out the door in 2017, but it’s a significant change. Fiber is a “complete rewrite of React”, although the goal is to “maintain backwards compatibility wherever possible”. Once Fiber is in place, Facebook hopes to enable “web apps with 60 fps and animations”.