isNaN (Lodash Compatibility)

Use Number.isNaN

This isNaN function operates slowly due to additional function calls.

Instead, use the faster and modern Number.isNaN.

Checks if a value is NaN.

const result = isNaN(value);

Reference

isNaN(value)

Use isNaN when you want to check if a value is NaN.

import { isNaN } from 'es-toolkit/compat';

// NaN checks
isNaN(NaN);
// Returns: true

isNaN(Number.NaN);
// Returns: true

// Other values
isNaN(undefined);
// Returns: false

isNaN(null);
// Returns: false

isNaN(0);
// Returns: false

isNaN('NaN');
// Returns: false

Parameters

• value (unknown): The value to check if it's NaN.

Returns

(boolean): Returns true if the value is NaN, otherwise false.