Html Details Summary — Free Html Tutorial

Learn Html Details Summary in Html with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.

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TL;DR: Learn Html Details Summary in Html with a free, beginner-friendly tutorial, examples and practice for Indian students on Syllab.in.

Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated Jul 14, 2026

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Html Details Summary in Html

<details> creates collapsible content. <summary> is the clickable header. Content inside details expands/collapses on click.

No JavaScript needed — native browser functionality. open attribute expands it by default.

Perfect for FAQs, accordions, and collapsible sections.

Html Details Summary — Syntax

<details>
  <summary>Click to expand</summary>
  <p>Hidden content here</p>
</details>

<details open>
  <summary>Expanded by default</summary>
  <p>Already visible</p>
</details>

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