1 files changed, 21 insertions, 0 deletions
diff --git a/components/script/dom/webidls/PerformanceObserver.webidl b/components/script/dom/webidls/PerformanceObserver.webidl
new file mode 100644
index 00000000000..a67c52e2730
--- /dev/null
+++ b/components/script/dom/webidls/PerformanceObserver.webidl
@@ -0,0 +1,21 @@
+/* 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://w3c.github.io/performance-timeline/#the-performanceobserver-interface
+ */
+
+dictionary PerformanceObserverInit {
+  required sequence<DOMString> entryTypes;
+};
+
+callback PerformanceObserverCallback = void (PerformanceObserverEntryList entries, PerformanceObserver observer);
+
+[Constructor(PerformanceObserverCallback callback),
+ Exposed=(Window,Worker)]
+interface PerformanceObserver {
+  [Throws]
+  void observe(PerformanceObserverInit options);
+  void disconnect();
+};