diff -r 000000000000 -r 6474c204b198 dom/interfaces/html/nsIDOMHTMLOptionsCollection.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/interfaces/html/nsIDOMHTMLOptionsCollection.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,52 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsIDOMHTMLElement.idl"
+#include "nsIDOMHTMLCollection.idl"
+
+interface nsIDOMHTMLOptionElement;
+interface nsIDOMHTMLSelectElement;
+
+/**
+ * The nsIDOMHTMLOptionsCollection interface is the interface to a
+ * collection of [X]HTML option elements.
+ *
+ * This interface is trying to follow the DOM Level 2 HTML specification:
+ * http://www.w3.org/TR/DOM-Level-2-HTML/
+ *
+ * with changes from the work-in-progress WHATWG HTML specification:
+ * http://www.whatwg.org/specs/web-apps/current-work/
+ */
+
+// Introduced in DOM Level 2:
+[scriptable, uuid(4173cc53-30f6-4d12-a770-981ba53164e2)]
+interface nsIDOMHTMLOptionsCollection : nsISupports
+{
+           attribute unsigned long   length;
+                                        // raises(DOMException) on setting
+
+  // FIXME item should just be inherited from nsIDOMHTMLCollection
+  nsIDOMNode         item(in unsigned long index);
+
+  // FIXME namedItem (and getNamedItem) should return a NodeList if there are
+  //       multiple matching items
+  nsIDOMNode namedItem(in DOMString name);
+
+           attribute long             selectedIndex;
+
+  [noscript] void    setOption(in unsigned long index,
+                               in nsIDOMHTMLOptionElement option);
+
+  [noscript] readonly attribute nsIDOMHTMLSelectElement select;
+
+  // This add method implementation means the following
+  // since IDL doesn't support overloading.
+  //   void add(in nsIDOMHTMLOptionElement,
+  //            [optional] in nsIDOMHTMLOptionElement)
+  //   void add(in nsIDOMHTMLOptionElement, in long)
+  void                      add(in nsIDOMHTMLOptionElement option,
+                                [optional] in nsIVariant before);
+  void                      remove(in long index);
+};