isDate (Lodash Compatibility)

::: warning Use es-toolkit's isDate instead This isDate function operates slowly due to complex processing for Lodash compatibility.

Use the faster and more modern es-toolkit's isDate instead. :::

Checks if a value is a Date object.

const result = isDate(value);

Usage

isDate(value)

Use isDate when you want to type-safely check if a value is a Date object. It also works as a type guard in TypeScript.

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

// Check Date object
const date = new Date();
isDate(date); // true

// Invalid Date is also recognized as a Date object
const invalidDate = new Date('invalid');
isDate(invalidDate); // true

// Other types return false
isDate('2024-01-01'); // false
isDate(1640995200000); // false
isDate({}); // false
isDate(null); // false
isDate(undefined); // false

Parameters

• value (unknown): The value to check if it's a Date object.

Returns

(value is Date): Returns true if the value is a Date object, false otherwise.