- var isNumber = require('./isNumber');
- var $isNaN = require('../number/isNaN');
- /**
- * Check if value is NaN for realz
- */
- function isNaN(val){
- // based on the fact that NaN !== NaN
- // need to check if it's a number to avoid conflicts with host objects
- // also need to coerce ToNumber to avoid edge case `new Number(NaN)`
- return !isNumber(val) || $isNaN(Number(val));
- }
- module.exports = isNaN;
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