mout
Version:
Modular Utilities
16 lines (12 loc) • 404 B
JavaScript
define(['./isNumber'], function (isNumber) {
/**
* 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) || val != +val;
}
return isNaN;
});