Document Resources
Stylesheet Link
Attach Presentation as a Resource
The document links a theme stylesheet before the body renders a primary button that receives that presentation.
Program
HTML links external resources with relationship metadata. A stylesheet link does not draw by itself; it changes how later elements are presented.
stylesheet_link.html
<head>
<link rel="stylesheet" href="theme.css">
</head>
<body>
<button class="primary">Save draft</button>
</body>
rel stylesheet
rel="stylesheet" tells the browser that the linked resource is CSS.
href
The href attribute gives the URL of the resource to fetch.