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https://github.com/facebook/react-native.git
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Rubén Norte
333755367f
Summary: This declares a few globals that were missing in our `global.js` Flow declaration file: * `process` * `performance` with its current definition. We'll replace it with the new API when we replace `setupPerformance` with `setupWebPerformance`. * `navigator` * `setImmediate` * `clearImmediate` Eventually we should stop including all DOM definitions that Flow provides out of the box and define only what we provide (which is pretty much this file). Changelog: [Internal] Reviewed By: christophpurrer Differential Revision: D42964772 fbshipit-source-id: 6156968e8a9d193e7068d8a5043aa682ad45bba1
26 lines
726 B
JavaScript
26 lines
726 B
JavaScript
/**
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @flow strict
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* @format
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*/
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if (!global.performance) {
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global.performance = ({}: {now?: () => number});
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}
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/**
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* Returns a double, measured in milliseconds.
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* https://developer.mozilla.org/en-US/docs/Web/API/Performance/now
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*/
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if (typeof global.performance.now !== 'function') {
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// $FlowExpectedError[cannot-write] The global isn't writable anywhere but here, where we define it.
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global.performance.now = function () {
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const performanceNow = global.nativePerformanceNow || Date.now;
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return performanceNow();
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};
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}
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