@zeix/ui-element/docs-src/components/accordion-panel/accordion-panel.html

UIElement - a HTML-first library for reactive Web Components

<accordion-panel>
	<details open>
		<summary>
			<div class="summary">Tab 1</div>
		</summary>
		Content for Tab 1
	</details>
</accordion-panel>
<accordion-panel>
	<details>
		<summary>
			<div class="summary">Tab 2</div>
		</summary>
		Content for Tab 2
	</details>
</accordion-panel>
<accordion-panel>
	<details>
		<summary>
			<div class="summary">Tab 3</div>
		</summary>
		Content for Tab 3
	</details>
</accordion-panel>