React vs React on Rails: What are the differences?
React: A JavaScript library for building user interfaces. Lots of people use React as the V in MVC. Since React makes no assumptions about the rest of your technology stack, it's easy to try it out on a small feature in an existing project; React on Rails: Integration of React + Webpack + Rails using rails/webpacker to build Universal (Isomorphic) Apps (aka Server Rendering).
Project Objective: To provide an opinionated and optimal framework for integrating Ruby on Rails with React via the Webpacker gem
React on Rails integrates Facebook's React front-end framework with Rails. React v0.14.x and greater is supported, with server rendering. Redux and React-Router are supported as well, also with server rendering, using execJS..
React and React on Rails are primarily classified as "Javascript UI Libraries" and "Frameworks (Full Stack)" tools respectively.
React and React on Rails are both open source tools. React with 132K GitHub stars and 24.5K forks on GitHub appears to be more popular than React on Rails with 4.32K GitHub stars and 542 GitHub forks.