Template Inheritance

Template inheritance is not part of the Mustache spec yet but it is a commonly implemented feature. Template inheritance allows you to override elements of an included partial. It allows you to create a base page template and override elements of it with your page content. A partial that includes overriding elements is indicated with a {{<partial}}. Note this is different from the normal partial reference which uses >. This is a section tag so needs a ending tag as well. Inside the section the tagged sections to override are added using the syntax {{$tag}}contents{{/tag}}. If your template and partial were as follows

{{! mypage.mustache }}
{{<base}}
{{$head}}<title>My page title</title>{{/head}}
{{$body}}Hello world{{/body}}
{{/base}}
{{! base.mustache }}
<html>
<head>
{{$head}}{{/head}}
</head>
<body>
{{$body}}Default text{{/body}}
</body>
</html>

You would get the following output when rendering mypage.mustache.

<html>
<head>
<title>My page title</title>
</head>
<body>
Hello world
</body>

Note the {{$head}} section in base.mustache is replaced with the {{$head}} section included inside the {{<base}} partial reference from mypage.mustache. The same occurs with the {{$body}} section. In that case though a default value is supplied for the situation where a {{$body}} section is not supplied.