25 lines
606 B
Plaintext
25 lines
606 B
Plaintext
/**
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* Copyright (c) 2018-present, Facebook, Inc.
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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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*/
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declare function isInteger(value: mixed): boolean %checks(typeof value ===
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'number');
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/* eslint-disable no-redeclare */
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// $FlowFixMe workaround for: https://github.com/facebook/flow/issues/4441
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const isInteger =
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Number.isInteger ||
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function(value) {
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return (
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typeof value === 'number' &&
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isFinite(value) &&
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Math.floor(value) === value
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);
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};
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export default isInteger;
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