Can i use
H1, H2, H3, H4, H5, H6
The element h4 must not appear as a descendant of the th element.
<h4>first title</h4> <h4>second title</h4> <h4>third title</h4>
<p>first parahraph</p> <p>second parahraph</p> <p>third parahraph</p>
Flow content, but with no header, footer, sectioning content, or heading content descendants.
"Heading content" refers to the
h2 etc. elements, as well as the
Heading content defines the header of a section (whether explicitly marked up using sectioning content elements, or implied by the heading content itself).
h1 h2 h3 h4 h5 h6 hgroup