Is HTML5 Details Polyfill free?

Yes, HTML5 Details Polyfill is free to use. It is available as a free plugin on WordPress.org.

How many websites use HTML5 Details Polyfill?

HTML5 Details Polyfill has 60 active installations as tracked by WordPress.org.

What are the best HTML5 Details Polyfill alternatives?

Popular alternatives to HTML5 Details Polyfill include Easy Video Player, Videojs HTML5 Player, Gravity Forms – Placeholders add-on. You can compare them side-by-side on our comparison pages.

Does HTML5 Details Polyfill work with the latest WordPress?

HTML5 Details Polyfill has been tested up to WordPress 3.4.2. It requires WordPress 3.0.1+ and PHP false+.

HTML5 Details Polyfill — Reviews, Rating & Alternatives (2026)

As of April 2026, HTML5 Details Polyfill is a WordPress HTML5 plugin with 60 active installations and a 5/5 rating from 4 reviews. It has been downloaded 2.3K+ times in total. Requires WordPress 3.0.1+ and PHP false+. Available on WordPress.org since 2012. Last updated 13 years ago — may have compatibility concerns. Top alternative: Easy Video Player.

5/54 reviews

60active installs

2.3K+total downloads

14 yearssince 2012

Overview

Adds fallback support for the HTML5 <details> and <summary> elements in browsers that don’t support them using Mathias Bynens’ <details>/<summary> jQuery plugin.

Once the plugin is activated on your site, the following HTML should work in all modern browsers, even if they don’t natively support the <details> and <summary> elements:

<details>
  <summary>Click for more info...</summary>
  This is where you'd add the additional content that won't be seen until the "summary" is clicked.
</details>

Read full description on WordPress.org