<details-menu> element

A menu that's opened with a <details> button.

Installation

$ npm install @github/details-menu-element

Usage

import '@github/details-menu-element'

<details>
  <summary>Robots</summary>
  <details-menu>
    <ul>
      <li><button type="button" role="menuitem">Hubot</button></li>
      <li><button type="button" role="menuitem">Bender</button></li>
      <li><button type="button" role="menuitem">BB-8</button></li>
    </ul>
  </details-menu>
</details>

Use data-menu-button and data-menu-button-text to have button text updated on menu item activation.

<details>
  <summary>Preferred robot: <span data-menu-button>None</span></summary>
  <details-menu>
    <ul>
      <li><button type="button" role="menuitem" data-menu-button-text>Hubot</button></li>
      <li><button type="button" role="menuitem" data-menu-button-text>Bender</button></li>
      <li><button type="button" role="menuitem" data-menu-button-text>BB-8</button></li>
    </ul>
  </details-menu>
</details>

Deferred loading

Menu content can be loaded from a server by embedding an <include-fragment> element.

<details>
  <summary>Robots</summary>
  <details-menu src="/robots">
    <include-fragment>Loading…</include-fragment>
  </details-menu>
</details>

The src attribute value is copied to the <include-fragment> the first time the <details> button is toggled open, which starts the server fetch.

Browser support

Browsers without native custom element support require a polyfill.

• Chrome
• Firefox
• Safari
• Internet Explorer 11
• Microsoft Edge

Development

npm install
npm test

License

Distributed under the MIT license. See LICENSE for details.