26 lines
590 B
JavaScript
26 lines
590 B
JavaScript
/*!
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* Chai - isNaN utility
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* Copyright(c) 2012-2015 Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
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* MIT Licensed
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*/
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/**
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* ### .isNaN(value)
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*
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* Checks if the given value is NaN or not.
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*
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* utils.isNaN(NaN); // true
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*
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* @param {Value} The value which has to be checked if it is NaN
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* @name isNaN
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* @api private
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*/
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function isNaN(value) {
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// Refer http://www.ecma-international.org/ecma-262/6.0/#sec-isnan-number
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// section's NOTE.
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return value !== value;
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}
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// If ECMAScript 6's Number.isNaN is present, prefer that.
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module.exports = Number.isNaN || isNaN;
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