Function isNaN

MathBox/mathbox-bundle.js:37581–37585

* Checks if `value` is `NaN`. * * Note: This is not the same as native `isNaN` which will return `true` for * `undefined` and other non-numeric values. See http://es5.github.io/#x15.1.2.4. * * @static * @memberOf _ * @category Objects * @param {*} value The va

(value)

     * // => false
     */
    function isNaN(value) {
      // `NaN` as a primitive is the only value that is not equal to itself
      // (perform the [[Class]] check first to avoid errors with some host objects in IE)
      return isNumber(value) && value != +value;
    }

    /**
     * Checks if `value` is `null`.