Details Polyfill ES6

A simple ES6 polyfill for the <details> element. The <details> element allows users to toggle the visibility of additional content by using a <summary> element as a legend to describe the content of the <details> element.

As there is not currently complete browser support (http://caniuse.com/#search=details) this polyfill uses JavaScript and CSS to provide this functionality when required.

For more details on the implementation of the <details> element see https://www.w3.org/wiki/HTML/Elements/details.

Installation

$ npm install --save details-polyfill-es6

Use an import to include the polyfill into your codebase. No further initialisation is required.

import 'details-polyfill-es6';

Usage

<details>
  <summary>Show more</summary>
  <p>The content</p>
</details>

How does it work?

The polyfill injects some basic CSS to mimic the functionality of the <details> element alongside additional attributes on the markup to increase the accessibility of the markup. The JavaScript listens for clicks and keypresses on the <summary> element and toggles the open attribute on the parent <details> element.

You may override the basic styles in CSS to suit your own designs, with details[open] allowing you to style the open state of the <details> element.

Credits

This polyfill uses various fragments of code and learnings from a few existing polyfills.

• https://github.com/leifoolsen/lavu-details-polyfill
• https://github.com/jordanaustin/Details-Expander
• https://mathiasbynens.be/notes/html5-details-jquery#comment-35