1.3. Structure the main content area with <main role="main">
The main content area of the page must be marked up with <main role="main">
.
Warning
A page must contain only one visible <main role="main">
tag.
<header role="banner">[…]</header> <nav role="navigation">[…]</nav> <main role="main">[…]</main> <footer role="contentinfo">[…]</footer>