isnan

List of JavaScript methods which you can use natively + ESLint Plugin

JavaScript/Node.js utility. Returns `true` if the value is a number or string number. Useful for checking regex match results, user input, parsed strings, etc.

ES6-compliant shim for Number.isNaN - the global isNaN returns false positives.

A `Number.isNaN` polyfill, based on the ECMAScript 6 specification.

Test if a value is NaN.

Check data types in javascript

ES6-compliant shim for Number.isNaN - the global isNaN returns false positives.

Juego de BlackJack con JavaScript

LAPACK auxiliary routine to test input for NaN by comparing two double-precision floating-point arguments for inequality.

LAPACK auxiliary routine to test whether a double-precision floating-point number is NaN.