What is the usage of the pseudo class :not()? : <p>I saw this pseudo class <code>:not()</code> being used in a source code of a <strong>Youtube</strong> video page, searching in the <strong>MDN</strong> I saw <a href="https://developer.mozilla.org/en-US/docs/Web/CSS/:not" rel="nofollow noreferrer">this article</a> explaining the pseudo class, but I couldn't understand why (<em>and in which case</em>) someone would use that. </p>
