<hr width="10%" align="right" />

Question

For the align attribute lesson, why is the horizontal line element not closed before defining its attributes?
I mean its tag should be closed before defining attribute for it.

<strong>#iamconfused</strong>

Answer 1

In HTML, the <hr> tag has no end tag.
In XHTML, the <hr> tag must be properly closed, like this: <hr />.

https://www.w3schools.com/tags/tag_hr.asp

Answer 2

A little bit on why, see "Empty HTML Elements":

https://www.w3schools.com/html/html_elements.asp

In the specifications:

https://dev.w3.org/html5/html-author/#void