React application structure

- [Instructor] ReactJS is a JavaScript library…developed by Facebook and Instagram…for building user interfaces for the web.…If we look at the MVC paradigm,…then ReactJS focus is primarily on the view,…the visual components, and that's where its strengths lie.…Now, React is a very unique in two main areas.…First, it's the UI components.…UI components are defined entirely in JavaScript in ReactJS.…This may not mean lot to a lot of people,…but, to a web developer, this means a lot.…One, there are no separate templates to work with,…and two, you have all the power…and the flexibility of JavaScript all in single place.…

I think that's pretty cool.…The second, which is the most important feature in ReactJS,…is how we updates the DOM.…I'll show you in separate video how this works…but, for now, let's take a look at this very simple…React application and see how things work.…I have a really simple page here.…There's no element other than just this div here,…id container.…This is the location where the target will be…