React and React Native

Originally created by Jordan Walke at Facebook in 2013, React has quickly evolved into one of the leading user interface libraries currently in use. In contrast with Angular, React does not seek to be a complete framework, but rather focuses on specific parts of the web workflow. Since web pages are inherently stateless (that is, no real information is transferred from page to page), SPAs aim to store certain pieces of state in JavaScript memory, enabling subsequent views to be populated with data. React is a prime example of how this type of architecture works while still not encompassing the entire framework paradigm. In MVC terminology, React deals with the view layer.