mirror of
https://github.com/facebook/react.git
synced 2025-11-01 09:12:30 +00:00
Paul O’Shannessy
8a47813baa
grep -rl 'Copyright 2013 Facebook' static_upstream | xargs perl -pi -w -e s/Copyright 2013 Facebook/Copyright 2013-2014 Facebook/g;' Not going to check in a script to do this since it will just change every year. Closes #1006
43 lines
1.2 KiB
JavaScript
43 lines
1.2 KiB
JavaScript
/**
|
|
* Copyright 2013-2014 Facebook, Inc.
|
|
*
|
|
* 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.
|
|
*
|
|
* @providesModule performanceNow
|
|
* @typechecks static-only
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
var ExecutionEnvironment = require('ExecutionEnvironment');
|
|
|
|
/**
|
|
* Detect if we can use window.performance.now() and gracefully
|
|
* fallback to Date.now() if it doesn't exist.
|
|
* We need to support Firefox < 15 for now due to Facebook's webdriver
|
|
* infrastructure.
|
|
*/
|
|
var performance = null;
|
|
|
|
if (ExecutionEnvironment.canUseDOM) {
|
|
performance = window.performance || window.webkitPerformance;
|
|
}
|
|
|
|
if (!performance || !performance.now) {
|
|
performance = Date;
|
|
}
|
|
|
|
var performanceNow = performance.now.bind(performance);
|
|
|
|
module.exports = performanceNow;
|