isInteger (Lodash Compatibility)

::: warning Use Number.isInteger

This isInteger function operates slowly due to additional type checking overhead.

Instead, use the faster and modern Number.isInteger.

:::

Checks if a value is an integer.

const result = isInteger(value);

Usage

isInteger(value)

Use isInteger when you need to check if a given value is an integer. This function also works as a type guard in TypeScript, narrowing the type of the value to number.

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

// Integer value checks
isInteger(3); // true
isInteger(-5); // true
isInteger(0); // true

// Decimal values are false
isInteger(3.14); // false
isInteger(-2.5); // false

// Infinity is false
isInteger(Infinity); // false
isInteger(-Infinity); // false

// Other types are also false
isInteger('3'); // false
isInteger([]); // false
isInteger({}); // false

Parameters

• value (any): The value to check.

Returns

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