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Last Updated: 1/24/2026
Unclosed Tags Test
This document contains HTML-like content that is valid Markdown but invalid strict MDX.
Common Unclosed HTML Tags
The
tag creates a line break.
Use
for a horizontal rule.
The 
tag displays an image.
An field for user input.
Block-Level Unclosed Tags
This div is never closed, which is fine in lenient MD mode.
This section isn't closed either.
And this article tag stays open.
Inline Unclosed Tags
Here’s a in the middle of text.
And a tag that doesn’t close.
Plus an for emphasis.
Nested Unclosed Tags
Deeply nested unclosed tags
Self-Closing vs Non-Self-Closing
In HTML5, these are valid without closing:
In XHTML/JSX, they need self-closing:
This document uses the HTML5 style intentionally.
Tags with Complex Attributes
Or even fragments: <div class=“
Comment-Like Content
This looks like an HTML comment but isn’t: {/* not a comment
And this is just greater/less than: < and >
Mixed Valid and Invalid
Unclosed div
Unclosed span {/* This one is NOT closed */}
First unclosed
Second also unclosed