4 ms·

You have to know about what breaks out of <p> tags regardless of whether or not you leave off the end tag, though. <p><div></div></p> is invalid HTML because <

You have to know about what breaks out of <p> tags regardless of whether or not you leave off the end tag, though. <p><div></div></p> is invalid HTML because <div> ends the paragraph, resulting in an unpaired </p>.

anjbe 4y ago
And not just because of that. In XHTML‐as‐XML, where <div> does not implicitly end the paragraph, what you posted is still invalid because <p> cannot contain <div>.