element in HTML
<startTag>
content
</endTag>
where:
A Tag may be still open and still design a empty element. This elements are known as void elements
Example: What is the HR HTML tag? (Horizontal Rule) may be written
<hr>
Each element in HTML falls into zero or more categories that group elements with similar characteristics together. See Content type
The space characters are always allowed between elements. User agents represent these characters between elements in the source markup as Text nodes in the DOM.
see HTML - Focus (Active element) (and Blur)
See DOM - Element