Example of an interactive component using ARIA attributes.

flyout-closed.html

<button class="flyout-button"
        id="browseTopics"
        aria-expanded="false">Browse Topic</button>

<div class="flyout" 
     aria-labelledby="browseTopics" 
     aria-hidden="true" >...</div>

flyout-open.html

<button class="flyout-button"
        id="browseTopics"
        aria-expanded="true">Browse Topic</button>

<div class="flyout" 
     aria-labelledby="browseTopics" 
     aria-hidden="false" >...</div>