Aria Menu keyboard navigation

Allows a user to use arrow keys to navigate a three-level menu.

Background

These files are a direct adaptation of the WAI Aria practices navigation menubar example. For an overview of this pattern and why to adopt it, we recommend the following documentation from w3.org.

It has been modified from that example in the following ways:

- All of the mouse (click and hover) events that were in the original example have been removed.
- All css styles and classes from the example have been removed in favor of letting the theme's stylesheets apply its own directives to aria-expanded and aria-hidden elements.
- The code has been updated to modern javascript standards.

How to use

At the top of your code:

``js
import AriaMenu from 'aria-menu';
`

Then in the body:

`js
const menuElement = document.querySelector('#id-of-list-element');
const menu = new AriaMenu(menuElement);
menu.init();
`

In order for the visual changes to take place, you will need to add styles for [aria-hidden="true"] and [aria-hidden="false"]` in your project's css.

Contributing to this plugin

The original work is licensed under the following license.