1 files changed, 31 insertions, 0 deletions
diff --git a/dom/webidl/PerformanceObserver.webidl b/dom/webidl/PerformanceObserver.webidl
new file mode 100644
index 0000000000..041490e9d8
--- /dev/null
+++ b/dom/webidl/PerformanceObserver.webidl
@@ -0,0 +1,31 @@
+/* -*- 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://w3c.github.io/performance-timeline/#the-performanceobserver-interface
+ */
+
+dictionary PerformanceObserverInit {
+  sequence<DOMString> entryTypes;
+  DOMString type;
+  boolean buffered;
+  [Pref="dom.enable_event_timing"]
+  DOMHighResTimeStamp durationThreshold;
+};
+
+callback PerformanceObserverCallback = undefined (PerformanceObserverEntryList entries,
+                                                  PerformanceObserver observer);
+
+[Pref="dom.enable_performance_observer",
+ Exposed=(Window,Worker)]
+interface PerformanceObserver {
+    [Throws]
+    constructor(PerformanceObserverCallback callback);
+
+    [Throws] undefined observe(optional PerformanceObserverInit options = {});
+    undefined disconnect();
+    PerformanceEntryList takeRecords();
+    static readonly attribute object supportedEntryTypes;
+};