What is it React JS?

React is a front-end library used for handling the view layer for web and mobile apps and its developed by Facebook. ReactJS allows us to create reusable UI components. It is currently one of the most popular JavaScript libraries and has a strong foundation and large community behind it.

It makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes.


React has become the tool of choice for easily building dynamic user interfaces. The power is in the Virtual Dom — when your application's data changes, React figures out which parts of your document need to be changed, and immediately update only those parts.

JavaScript is everywhere now, as is React, and having strong React skills is a great way to get ahead with building modern web apps right now. Wes' teaching style is amongst the best in our industry and I'd recommend this course to anyone looking to get better at both JavaScript and React.

A Simple Component

React components implement a render() method that takes input data and returns what to display. This example uses an XML-like syntax called JSX. Input data that is passed into the component can be accessed by render() via this.props.


React gives you a template language and some function hooks to essentially render HTML. That's all React outputs, HTML. Your bundles of HTML / Javascript, called "components," can have their own internal state (such as which tab is selected in a tab view), but in the end you just barf out HTML.

Should I Learn React?

Short answer: yes.

Long answer: probably, yes, to do most things.

Here's why you should learn React:

Works great for teams, strongly enforcing UI and workflow patterns

UI code is readable and maintainable

Componentized UI is the future of web development, and you need to start doing it now.

Server side rendering is one of the most important optimizations you can make to speed up a Javascript application. Browsers are designed from the ground up to show users rendered HTML as fast as possible. True "single page applications" are only appropriate for a subset of the web, like email clients where you typically leave them open for weeks and do very few actual page loads.

If you think you’re ready to start coding, head over to the APPLY NOW section and begin creating!


Server rendering with React isn't free, but once implemented, it's a breath of fresh air.

With as little as 15000/= Kenya shillings you can get started..

React allows developers to create large data driven web-applications and can change over time without reloading the page. It aims primarily to provide speed, simplicity, and scalability. React processes only user interfaces in applications. This corresponds to View in the Model-View-Controller (MVC) pattern, and can be used in combination with other JavaScript libraries or frameworks in MVC, such as Redux (JavaScript library).

React JS is easy to learn - You will enjoy.


We’ll assume you have some familiarity with HTML and JavaScript, but you should be able to follow along even if you haven’t used them before. And so it begins! The REACT JS Course assumes that you have some previous knowledge of HTML or CSS.

The lecturers present it in a way that It is easy to follow and then, to celebrate, everything that’s covered is brought together at the end, before moving on to the next step.