what do you put in details section of markdown code example

Example 1: markdown click to expand

## Markdown collapsible section
<details>
  <summary>Click to expand!</summary>
  
  ## Heading
  1. Item
  2. list
     * Item
     * Item
```js
	console.log('code');
```

- code
	```js
		console.log('also code');
	```
</details>

Example 2: markdown hyperlink

[I'm an inline-style link](https://www.google.com)

[I'm an inline-style link with title](https://www.google.com "Google's Homepage")

[I'm a reference-style link][Arbitrary case-insensitive reference text]

[I'm a relative reference to a repository file](../blob/master/LICENSE)

[You can use numbers for reference-style link definitions][1]

Or leave it empty and use the [link text itself].

URLs and URLs in angle brackets will automatically get turned into links. 
http://www.example.com or <http://www.example.com> and sometimes 
example.com (but not on Github, for example).

Some text to show that the reference links can follow later.

[arbitrary case-insensitive reference text]: https://www.mozilla.org
[1]: http://slashdot.org
[link text itself]: http://www.reddit.com