iris/_examples/view/template_html_5/views/about.html

{{ define "about-head"}}
    <title>about page</title>
    <style type="text/css">
        body {
            background: #666;
        }
    </style>
{{ end }}

{{ define "about-body"}}
    extend body content in layout.
{{ end }}
<div>
    Hello about page
</div>