1 files changed, 15 insertions, 0 deletions
diff --git a/dom/webidl/CSSMarginRule.webidl b/dom/webidl/CSSMarginRule.webidl
new file mode 100644
index 0000000000..8210bbb79f
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+++ b/dom/webidl/CSSMarginRule.webidl
@@ -0,0 +1,15 @@
+/* -*- 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/.
+ *
+ * The origin of this IDL file is
+ * https://drafts.csswg.org/cssom/#the-cssmarginrule-interface
+ */
+
+// https://drafts.csswg.org/cssom/#the-cssmarginrule-interface
+[Pref="layout.css.margin-rules.enabled", Exposed=Window]
+interface CSSMarginRule : CSSRule {
+  readonly attribute UTF8String name;
+  [SameObject, PutForwards=cssText] readonly attribute CSSStyleDeclaration style;
+};