I'm confused by the title. Why no mention of e.g. Chrome, Safari or Firefox?

And if it's meant to be a React alternative, then I suppose it should support native as well.

It's suspect it's not in the title, because it's assumed and not interesting or unique. Browser compatibility is listed on linked page.

While it may share a common history and core with ReactJS, React Native is really a separate beast. I realize it may be confusing due to the overlap in names. When people say React they are generally referring to https://reactjs.org and not the intersection it has with http://www.reactnative.com/ or the union of the two projects.

underwater

React and React Native are very much related. Both use the same core 'react' library, and differ between 'react-dom' and 'react-native' (and the native code).

The official docs for React Native are at http://facebook.github.io/react-native/ by the way.

EgoIncarnate

I know, which is why I said they have a common history and core. react and react-dom are both part of the same github project at https://github.com/facebook/react. Frequently when people are talking about React, they only mean the HTML version, not including React Native. For example, the Nerv project mentioned in this post.

While React Native makes use of the react core package, it is a separate github project http://facebook.github.io/react-native/