add doc comment for #9517

javascript.html

@@ -1104,7 +1104,7 @@ $('#myTooltip').on('hidden.bs.tooltip', function () {
             <td>string | false</td>
             <td>false</td>
             <td>
-             <p>Appends the popover to a specific element. Example: <code>container: 'body'</code></p>
+             <p>Appends the popover to a specific element. Example: <code>container: 'body'</code>. This option is particularly useful inthat it allows you to position the popover in the flow of the document near the triggering element - which will prevent the popover from floating away from the triggering element during a window resize.</p>
             </td>
           </tr>
         </tbody>