Including an external stylesheet file in your HTML document

The <link> element can be used to include an external style sheet file in your HTML document.

An external style sheet is a separate text file with .css extension. You define all the Style rules within this text file and then you can include this file in any HTML document using <link> element.

Consider a simple style sheet file with a name new.css having the following rules:

h1, h2, h3 {
   color: #36C;
   font-weight: normal;
   letter-spacing: .4em;
   margin-bottom: 1em;
   text-transform: lowercase;

Now you can include this file new.css in any HTML document as follows:

   <link type = "text/css" href = "new.css" media = " all" />