The XMP element
by spdustin
HTML
<p>
Here's another HTML element that isn't really used. Mostly because it's a <a href="https://html.spec.whatwg.org/#non-conforming-features">non-conforming feature</a>, and "must not be used" by authors: the <code>xmp</code> element.
</p>
<p>
The <code>xmp</code> element switches the parser's context to text-only, which means that anything that looks like markup will be ignored and passed through as-is.
</p>
<p>
For example, this code:
<pre>
<xmp>
<p>Hello, world!</p>
</xmp>
</pre>
renders like this:
</p>
<xmp>
<p>Hello, world!</p>
</xmp>