1 files changed, 26 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..db511a7b4b7
--- /dev/null
+++ b/components/script/dom/webidls/PerformanceObserver.webidl
@@ -0,0 +1,26 @@
+/* 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 https://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;
+};
+
+callback PerformanceObserverCallback = void (PerformanceObserverEntryList entries, PerformanceObserver observer);
+
+[Exposed=(Window,Worker)]
+interface PerformanceObserver {
+  [Throws] constructor(PerformanceObserverCallback callback);
+  [Throws]
+  void observe(optional PerformanceObserverInit options = {});
+  void disconnect();
+  PerformanceEntryList takeRecords();
+  // codegen doesn't like SameObject+static and doesn't know FrozenArray
+  /*[SameObject]*/ static readonly attribute /*FrozenArray<DOMString>*/ any supportedEntryTypes;
+};