React is not an end-to-end JavaScript application framework. It has no support for models or controllers, although there are projects related to React that cover these functions, along with routing.

As promised in February, Microsoft embraced the wildly popular React JavaScript library in Visual Studio 2015 by providing built-in support for its JSX syntax. So I took it for a spin. It works.

Beyond the usual quick tips, let's look at both the business case and the technical side of keeping React bundles lean.

Now available in production release, Version 16.8 of the React JavaScript UI library has the hooks capability, for using state and other React features without having to write a class.