Update DialogDoc

src/views/dialog/DialogDoc.vue

@@ -221,6 +221,12 @@ export default {
                         <td>boolean</td>
                         <td>true</td>
                         <td>Keeps dialog in the viewport when dragging.</td>
+                    </tr>
+                    <tr>
+                        <td>appendTo</td>
+                        <td>string</td>
+                        <td>body</td>
+                        <td>A valid query selector or an HTMLElement to specify where the dialog gets attached. Special keywords are "body" for document body and "self" for the element itself.</td>
                     </tr>
 				</tbody>
 			</table>