Rebuild docs

Author: ericwbailey

docs/index.html

@@ -27,7 +27,7 @@ <h1>Accessible HTML Content Patterns</h1>
     </a>
 </aside><!-- End of #section__project-link -->
 
-<main role="main">
+<main tabindex="-1">
 
 <nav id="section__table-of-contents" aria-labelledby="title__table-of-contents"><!-- Start of #section__table-of-contents -->
     <h2 id="title__table-of-contents">Table of Contents</h2>
@@ -635,7 +635,12 @@ <h3 id="subsection__canvas">Canvas</h3><!-- Start of #subsection__canvas -->
         height="400">
         Your browser does not support the <code>&lt;canvas&gt;</code> element.
         Please <a rel="external noopener" href="http://browsehappy.com/">consider upgrading your browser</a>.
-    </canvas><!-- End of #subsection__canvas -->
+    </canvas
+
+    <h3>Notes:</h3>
+    <p>
+        <small>Add <code>role="presentation"</code> to <code>&lt;track&gt;</code> to <a rel="external noopener" href="https://twitter.com/stevefaulkner/status/1039470607719694336">mute epeated announcement of graphic role by some screen readers</a>.
+    </p>><!-- End of #subsection__canvas -->
 </section><!-- End of #section__embedded -->
 
 <hr />