mout/src/lang/isNaN.ts

Modular Utilities

import isNumber from './isNumber';
import $isNaN from '../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));
}

export default isNaN;