Custom element dependency
Start
Section 1
Content 1.
Section 2
Content 2.
<amp-accordion class="sample">
<section expanded>
<h4>Section 1</h4>
<p>Content 1.</p>
</section>
<section>
<h4>Section 2</h4>
<div>Content 2.</div>
</section>
</amp-accordion>
End