1 files changed, 22 insertions, 0 deletions
diff --git a/dom/webidl/StyleSheetApplicableStateChangeEvent.webidl b/dom/webidl/StyleSheetApplicableStateChangeEvent.webidl
new file mode 100644
index 0000000000..82714bad00
--- /dev/null
+++ b/dom/webidl/StyleSheetApplicableStateChangeEvent.webidl
@@ -0,0 +1,22 @@
+/* -*- 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/.
+ */
+
+[ChromeOnly,
+ Exposed=Window]
+interface StyleSheetApplicableStateChangeEvent : Event
+{
+  constructor(DOMString type,
+              optional StyleSheetApplicableStateChangeEventInit eventInitDict = {});
+
+  readonly attribute CSSStyleSheet? stylesheet;
+  readonly attribute boolean applicable;
+};
+
+dictionary StyleSheetApplicableStateChangeEventInit : EventInit
+{
+  CSSStyleSheet? stylesheet = null;
+  boolean applicable = false;
+};