diff -r 000000000000 -r 6474c204b198 dom/interfaces/html/nsIDOMHTMLButtonElement.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/interfaces/html/nsIDOMHTMLButtonElement.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,45 @@
+/* -*- 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"
+
+/**
+ * The nsIDOMHTMLButtonElement interface is the interface to a [X]HTML
+ * button element.
+ *
+ * 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/
+ */
+
+interface nsIDOMValidityState;
+
+[scriptable, uuid(44b7a468-7dba-4f0c-9b4e-ee46dc0f26c7)]
+interface nsIDOMHTMLButtonElement : nsISupports
+{
+           attribute boolean               autofocus;
+           attribute boolean               disabled;
+  readonly attribute nsIDOMHTMLFormElement form;
+           attribute DOMString             formAction;
+           attribute DOMString             formEnctype;
+           attribute DOMString             formMethod;
+           attribute boolean               formNoValidate;
+           attribute DOMString             formTarget;
+
+           attribute DOMString             name;
+           attribute DOMString             type;
+           attribute DOMString             value;
+
+  // The following lines are part of the constraint validation API, see:
+  // http://www.whatwg.org/specs/web-apps/current-work/#the-constraint-validation-api
+  readonly attribute boolean             willValidate;
+  readonly attribute nsIDOMValidityState validity;
+  readonly attribute DOMString           validationMessage;
+  boolean checkValidity();
+  void setCustomValidity(in DOMString error);
+};
+