Updated comment of FileDelete.js

javascript/src/FileDelete.js

@@ -17,9 +17,13 @@ var QfqNS = QfqNS || {};
     'use strict';
 
     /**
+     * Handle file deletion.
      *
-     * @param formSelector
-     * @param targetUrl
+     * Upon instantiation, it attaches to all `<button>` elements having the class `delete-file`, within the elements
+     * selected by the `formSelector`.
+     *
+     * @param formSelector jQuery selector of the `<form>` this instance is responsible for.
+     * @param targetUrl endpoint URL to send delete requests to.
      * @constructor
      *
      * @name QfqNS.FileDelete