Underscore.JS - isNaN method

Syntax

_.isNaN(object)

isNaN method checks if object is a NaN or is undefined. See the below example −

Example

var _ = require('underscore');

//Example 1: Check if argument passed is a NaN
console.log(_.isNaN(NaN));

//Example 2: Check if argument passed is a NaN
console.log(_.isNaN(0));

Save the above program in tester.js. Run the following command to execute this program.

Command

\>node tester.js

Output

true
false