Code Quiz

Semantic Structure and Document Outline Bug

Spot the invalid semantic structure that breaks the document's landmark outline.

Codehtml

<body>
  <header>
    <h1>Tech Blog</h1>
    <nav><a href="/">Home</a></nav>
  </header>

  <main>
    <article>
      <h2>Understanding the Document Outline</h2>
      <p>Semantic elements shape the accessibility tree.</p>
    </article>
  </main>

  <aside>
    <h2>Related Posts</h2>
  </aside>

  <main>
    <section>
      <h2>Newsletter</h2>
    </section>
  </main>

  <footer>
    <p>&copy; 2024</p>
  </footer>
</body>

What is the semantic/structural bug in this document?

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