Full Stack Web Development with React

A warm welcome to the Full Stack Web Development with React course by Uplatz.

React is a JavaScript library, developed in 2013 by Jordan Walke of Facebook. You’ll find React is both very popular (it’s the 5th most starred JS library on GitHub) and used on major sites including on Facebook and Netflix.

What is ReactJS?

ReactJS is an open–source, component based front end library responsible only for the view layer of the application. It is maintained by Facebook. ReactJS uses virtual DOM based mechanism to fill in data (views) in HTML DOM. The virtual DOM works fast owning to the fact that it only changes individual DOM elements instead of reloading complete DOM every time.

In other words, React JS is a JavaScript library used in web development to build interactive elements on websites.

A React application is made up of multiple components, each responsible for outputting a small, reusable piece of HTML. Components can be nested within other components to allow complex applications to be built out of simple building blocks. A component may also maintain internal state – for example, a TabList component may store a variable corresponding to the currently open tab.

React allows us to write components using a domain–specific language called JSX. JSX allows us to write our components using HTML, whilst mixing in JavaScript events. React will internally convert this into a virtual DOM, and will ultimately output our HTML for us.