cobalt/dom/performance_observer.idl

// Copyright 2015 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// https://www.w3.org/TR/performance-timeline/#the-performanceobserver-interface

callback PerformanceObserverCallback = void (PerformanceObserverEntryList entries,
                                             PerformanceObserver observer);

[Constructor(PerformanceObserverCallback callback),
ConstructorCallWith=EnvironmentSettings,
Exposed=Window]
interface PerformanceObserver {
  [RaisesException] void observe (optional PerformanceObserverInit options);
  void disconnect ();
  PerformanceEntryList takeRecords();
  // TODO(b/236750294): Make this be FrozenArray<DOMString> when available.
  [SameObject] static readonly attribute sequence<DOMString> supportedEntryTypes;
};