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Make ReactDefaultPerf work server-side
We were reading from window which was throwing when ReactDefaultPerf was injected.
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/** | ||
* Copyright 2013 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 | ||
*/ | ||
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"use strict"; | ||
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var ExecutionEnvironment = require('ExecutionEnvironment'); | ||
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/** | ||
* 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; | ||
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if (ExecutionEnvironment.canUseDOM) { | ||
performance = window.performance || window.webkitPerformance; | ||
} | ||
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if (!performance || !performance.now) { | ||
performance = Date; | ||
} | ||
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var performanceNow = performance.now.bind(performance); | ||
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module.exports = performanceNow; |