The "styles" link now references the externalBlue.css style sheet in externalCSS.html. Add an open JavaScript " " tag to the file. Set the tag's "type" attribute to "text/javascript".

HTML provides the structure, content and layout, CSS adds style and design, and JavaScript adds functionality and interactivity.

CSS, or Cascading Style Sheets, defines the look and formatting of that HTML. Both are essential to coding your own website, and here's how to get acquainted with them.