27 строки
645 B
JavaScript
27 строки
645 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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'use strict';
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if (!global.performance) {
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global.performance = ({...null}: {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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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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