'use strict'; 
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var $ = require('../internals/export'); 
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// `Number.isNaN` method 
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// https://tc39.es/ecma262/#sec-number.isnan 
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$({ target: 'Number', stat: true }, { 
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  isNaN: function isNaN(number) { 
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    // eslint-disable-next-line no-self-compare -- NaN check 
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    return number !== number; 
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  } 
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}); 
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