HTML · Interactive widgets

details

A native disclosure widget that expands and collapses with no JavaScript.

htmlRunnable example html course

Syntax

<details>…</details>

Example

Try it

<details>
  <summary>What is a closure?</summary>
  <p>A function that keeps access to the scope where it was created.</p>
</details>

Reference pages are the quick answer. The course explains the why, shows the full example and ends with a challenge.