FastUI vs Lightning Web Components

This UI framework uses core Web Components standards and provides only what’s necessary to perform well in browsers. Because it’s built on code that runs natively in browsers, the framework is lightweight and delivers exceptional performance. Most of the code you write is standard JavaScript and HTML.

It is a new way to build web application user interfaces defined by declarative Python code. You can build responsive web applications using React without writing a single line of JavaScript, or touching npm.