HTML, CSS, and JavaScript — Web Design (Codecademy) Codecademy offers interactive courses that are suitable for web designing. This course provides an overview of the fundamental building blocks ...

HTML and CSS form the basic coding languages for web design and development. If you need to perform any kind of activity related to web manipulation, a working knowledge of these two is essential.

Previously, security researchers found web skimmers (Magecart scripts) inside favicons, site logos, live chat windows, and, most recently, in social media sharing buttons.