Output content before the content of a page or section.
Whether the content is for a page.
This mode is applied by html.content.pre after calling html.content.pre.custom. Importing stylesheets can use this to add additional content for specific types of input elements before the content of a page or section. If the page parameter is true, then this template is being called on an output page. Otherwise, it is being called on a section within a page.