title: How to add wai-aria property for file picker?
body: <p>I am currently following this tutorial to have a file picker functionality.
  <a href="http://www.alecjacobson.com/weblog/?p=1645" rel="nofollow noreferrer">http://www.alecjacobson.com/weblog/?p=1645</a></p>
  
  <p>I would like to add wai-aria attribute for "choose file" part to make it readable. I have tried to use aria-controls and tabindex but couldnt get any positive response when i simulate some validators.. Any idea?</p>
  
  <pre><code>&lt;body&gt;
      &lt;input id="file" type="file" multiple onchange="startRead()"&gt;
      &lt;h3&gt;Progress:&lt;/h3&gt;
      &lt;div style="width:100%;height:20px;border:1px solid black;"&gt;
      &lt;div id="bar" style="background-color:#45F;width:0px;height:20px;"&gt;&lt;/div&gt;
      &lt;/div&gt;
      &lt;h3&gt;File contents:&lt;/h3&gt;
      &lt;pre&gt;
          &lt;code id="output"&gt;
          &lt;/code&gt;
      &lt;/pre&gt;
  &lt;/body&gt;
  </code></pre>
  
  <p></p>