How to add a collapsible section in markdown.

markdown-details-collapsible.md

How to add a collapsible section in markdown.

Example

Click me

Heading

1. Foo
2. Bar
   • Baz
   • Qux

Some Code

function logSomething(something) {
  console.log('Something', something);
}

Code

<details>
  <summary>Click me</summary>
  
  ### Heading
  1. Foo
  2. Bar
     * Baz
     * Qux

  ### Some Code
  ```js
  function logSomething(something) {
    console.log('Something', something);
  }
  ```
</details>

Rules (If you don't do this, your code may not work)

1. Always have an empty line after the </summary> tag
2. Always have an empty line after each </details> tag