Web development is the work involved in developing a website for the Internet or an intranet. Web development can range from developing a simple single static page of plain text to complex web applications, electronic businesses, and social network services.

Web development is an in-demand skill in every industry sector. Whether you want to work at a startup tech company, in healthcare, finance, creative agency, for the public sector, or a mixture of all these, learning web development gives you the opportunity to get your foot in the door anywhere.

No, ReactJS is not a javascript framework, It is a javascript library

tabindex="0" attribute is necessary to make the div focusable