HTML
← 4 The elements of HTML - Table of Contents - 4.4 Grouping content → Some DOM operations (for example, parts of the drag and drop model) are defined in terms of " the body element". This refers to a particular element in the DOM, as per the definition of the term, and not any arbitrary element.
https://html.spec.whatwg.org/multipage/sections.html#the-footer-element