This is cool! It would be nice if you could support markdown formatting inside it these tags too!

<details> <summary>Expand this to see what I mean</summary> js this().is("a code block") === true bold - list - here - here - here - things </details>

Source:

<details>
  <summary>Expand this to see what I mean</summary>

  ```js
    this().is("a code block") === true
  ``\`



  **bold** 

  - list
    - here
    - here
    - here
       - things
</details>