React _is_ a framework, because: - You hand it your code and it calls your code when it wants to - Your code must conform to React's expectations. React is _

React _is_ a framework, because: - You hand it your code and it calls your code when it wants to - Your code must conform to React's expectations. React is _not_ a framework, because: - It only focuses on one thing: defining a tree of UI components. It doesn't include anything for HTTP requests, module definitions, generating expected file structures, or any of the other stuff you'd see in Angular and Ember. - You are responsible for initializing React in your app, and you can use it in a range of situations, from a full-bore SPA to adding some interactive widgets to an existing page. All those are true simultaneously.