1 files changed, 19 insertions, 0 deletions
diff --git a/devtools/shared/specs/media-rule.js b/devtools/shared/specs/media-rule.js
new file mode 100644
index 0000000000..3d887bbc77
--- /dev/null
+++ b/devtools/shared/specs/media-rule.js
@@ -0,0 +1,19 @@
+/* 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/. */
+"use strict";
+
+const { Arg, generateActorSpec } = require("devtools/shared/protocol");
+
+const mediaRuleSpec = generateActorSpec({
+  typeName: "mediarule",
+
+  events: {
+    "matches-change": {
+      type: "matchesChange",
+      matches: Arg(0, "boolean"),
+    },
+  },
+});
+
+exports.mediaRuleSpec = mediaRuleSpec;