> For the complete documentation index, see [llms.txt](https://cherrycake.tin.cat/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cherrycake.tin.cat/reference/core-modules/htmldocument/htmldocument-methods.md). # HtmlDocument methods ## footer Builds a standard HTML footer, from the \ to the \ tags. Works with the Javascript module to implement deferred JavaScript capabilities. **Returns:** The HTML footer ## header( setup ) Builds a standard HTML header, from the `` to the `` tags. It works with the [Css](/reference/core-modules/css.md) and [Javascript](/reference/core-modules/javascript.md) modules to include the proper CSS/JavaScript calls. * **`setup`** An optional hash array of the following optional setup keys: * **`bodyAdditionalCssClasses`** Additional CSS classes for the body element. Default: `false` **Returns:** The HTML header