Basic Accordion (pure html)

Basic Accordion code for html.

Code:

<details>
  <summary>This is the title of the details tag</summary>
  <p>Here's a paragraph inside a details element</p>
  Here's some text after the paragraph
</details>

Example:

source: https://stackoverflow.com/questions/8804113/how-to-create-an-accordion-menu-in-html-without-jquery