React

React is a free and open source javascript library for building User Interface. It is a tool that only takes care of all things related to the look and the logic around it.

• Get Started
• Take the Tutorial

React is a tool developed to build large-scale applications with data that change over time.

My judgment about this tool

• Easy to understand, because the writing style is declarative
• Can write codes with a smaller scale to be integrated into a whole application
• Ising JSX to write HTML in javascript so the browser can not read the syntax
• Can create Web, Moblie, or Desktop applications
• It's also easy debugging
• and many other advantages

The concept of components in react is also a modern web development concept.

In essence React is a UI library built by the facebook team, this is a very simple tool and also fast.

Source Code