Adding upstream version 115.7.0esr.upstream/115.7.0esr

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/dom/webidl/CSSContainerRule.webidl b/dom/webidl/CSSContainerRule.webidl
new file mode 100644
index 0000000000..0a4c96fdba
--- /dev/null
+++ b/dom/webidl/CSSContainerRule.webidl
@@ -0,0 +1,18 @@
+/* -*- 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/css-contain-3/#the-csscontainerrule-interface
+ */
+
+// https://drafts.csswg.org/css-contain-3/#the-csscontainerrule-interface
+[Exposed=Window, Pref="layout.css.container-queries.enabled"]
+interface CSSContainerRule : CSSConditionRule {
+  readonly attribute UTF8String containerName;
+  readonly attribute UTF8String containerQuery;
+
+  // Performs a container query look-up for an element.
+  [ChromeOnly] Element? queryContainerFor(Element element);
+};