4 * Default theme implementation for page titles.
7 * - title_attributes: HTML attributes for the page title element.
8 * - title_prefix: Additional output populated by modules, intended to be
9 * displayed in front of the main title tag that appears in the template.
10 * - title: The page title, for use in the actual content.
11 * - title_suffix: Additional output populated by modules, intended to be
12 * displayed after the main title tag that appears in the template.
16 * @see template_preprocess_page_title()
20 <h1{{ title_attributes.addClass('page-header') }}>{{ title }}</h1>