Over the last few years, mobile users have successfully overtaken desktop users. More websites are adopting a responsive design with strong CSS additions. Responsiveness is not JavaScript or jQuery. It is the concept of making your website look good on all devices. The evolution of smart devices means more people are ready to access your site on the go. Therefore, you need to be prepared to serve them a beautiful and fully functioning website on their respective devices. Does that mean you need to do away with jQuery? Not! A media query is an integral part of responsive website design, and you can use media query (as a CSS module) with jQuery as well.