updated comment

Author: tedbow

core/modules/outside_in/js/off-canvas.es6.js

@@ -11,7 +11,10 @@
 
 (($, Drupal, debounce, displace) => {
   /**
-   * what goes here???
+   * Off-canvas dialog implementation using jQuery Dialog.
+   *
+   * Transforms the regular dialogs created using Drupal.dialog when the dialog
+   * element equals '#drupal-off-canvas' into an side loading dialog.
    *
    * @namespace
    */