ReactJS 16 was announced to the world on September 26, 2017. Facebook has been working on releasing this new version for a while now. It’s great that there is a new release, bu tReactJS 16 is a very special release. What’s exciting about this new ReactJS release is the fact that it was entirely rewritten from scratch while ensuring that the public API remains unchanged. This major release brings a lot of new features, deprecations, and changes.