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      <base href="https://bugs.webkit.org/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - AX: Aria-activedescendant not supported"
   href="https://bugs.webkit.org/show_bug.cgi?id=161734">161734</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>AX: Aria-activedescendant not supported
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>Safari 9
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>OS X 10.11
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Critical
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>Accessibility
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>helene.vinh&#64;amadeus.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>webkit-bug-importer&#64;group.apple.com
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Hello,

I am working for Amadeus, a company that provides IT solutions for the travel industry.
We are developing a flight booking website that should be accessible to screen reader users.

We are currently encountering a specific issue with VoiceOver with the support of aria-activedescendant attribute.
This has been used to implement a datepicker and an autocomplete widget.
When navigating on the active element, VoiceOver is not reading it (suggestion in the autocomplete list and date in the datepicker).

Please launch the URL below to reproduce the issue.
The concerned widget are the city picker and the datepicker in the search bar at the top of the page.

Testing environment
We are testing on MAC OS El Capitain 10.11 with Safari browser and VoiceOver.

Best regards

URL for test page

<a href="https://pcm.uat01.amadeus.com/plnext/demo/Override.action?SO_SITE_RUI_HIDE_MDF_SRC=FALSE&amp;TRIP_FLOW=YES&amp;BOOKING_FLOW=REVENUE&amp;B_LOCATION_1=KEF&amp;B_LOCATION_2=LON&amp;B_DATE_1=201612110000&amp;B_ANY_TIME_1=TRUE&amp;E_LOCATION_1=LON&amp;E_LOCATION_2=KEF&amp;B_DATE_2=201612220000&amp;B_ANY_TIME_2=TRUE&amp;TRIP_TYPE=R&amp;EXTERNAL_ID=BOOKING&amp;PRICING_TYPE=O&amp;EMBEDDED_TRANSACTION=FlexPricerAvailability&amp;DISPLAY_TYPE=2&amp;ARRANGE_BY=D&amp;SO_SITE_MATRIX_CALENDAR=FALSE&amp;REFRESH=0&amp;COMMERCIAL_FARE_FAMILY_1=OWCOACHEU&amp;COMMERCIAL_FARE_FAMILY_2=OWCOMFVIA&amp;COMMERCIAL_FARE_FAMILY_3=OWCOMFVIA&amp;DATE_RANGE_VALUE_1=3&amp;DATE_RANGE_VALUE_2=3&amp;DATE_RANGE_QUALIFIER_1=C&amp;DATE_RANGE_QUALIFIER_2=C&amp;TRAVELLER_TYPE_1=ADT&amp;TRAVELLER_TYPE_2=&amp;TRAVELLER_TYPE_3=&amp;TRAVELLER_TYPE_4=&amp;TRAVELLER_TYPE_5=&amp;TRAVELLER_TYPE_6=&amp;TRAVELLER_TYPE_7=&amp;TRAVELLER_TYPE_8=&amp;TRAVELLER_TYPE_9=&amp;HAS_INFANT_1=FALSE&amp;HAS_INFANT_2=FALSE&amp;HAS_INFANT
        </div>
      </p>
      <hr>
      <span>You are receiving this mail because:</span>
      
      <ul>
          <li>You are the assignee for the bug.</li>
      </ul>
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