Or try this one sentence definition: JavaScript is a super important coding language used to add animated and interactive features to websites or web applications (on top of the basic, static structures created by languages like HTML and CSS).

Anytime you visit a website where things move, refresh, or otherwise change on your screen without requiring you to manually reload a web page, there’s a very good chance JS is the language making it happen.

Dynamic web content includes things like animated graphics, photo slideshows, and interactive forms.

JavaScript (or JS) is a scripting language used to create and control dynamic web content.

You can read all about JavaScript in our complete Tech 101 JavaScript guide, but here’s the TLDR: So let’s take a step back and deal with those terms first. But if you’re not familiar with JavaScript or JavaScript libraries, that’s not a helpful definition. React JS is a JavaScript library used in web development to build interactive elements on websites. To answer your questions and get you up to speed with this valuable web developer tool, we’ve put together a handy What is React JS tutorial. One buzzy skill you’ll see pop up is “ React JS.” But what is React JS? Is it another coding language? A software program? Or something totally different?

If you’re planning on building websites for a living, you probably know you’ll need to learn coding languages like HTML, CSS, and JavaScript, but you’ll also notice developer job listings that call for less familiar skills. Where it gets harder is figuring out exactly what skills you need to land a job. Figuring out that a flexible, high-paying career as a web developer is the dream is the easy part.

React tutorial