Check Date-like objects

isDateLike

Detects date-like objects from popular date/time libraries.

Features

• Detects native JavaScript Date objects
• Supports multiple popular date libraries:
  • Moment.js
  • Dayjs
  • Luxon
  • JS-Joda
  • Temporal
  • Chronos
• Type-safe TypeScript implementation
• Zero dependencies

Basic Usage

import { isDateLike } from 'nhb-toolbox';

const nativeDate = new Date();
const momentDate = moment(); // Moment.js
const luxonDate = DateTime.now(); // Luxon
const dayjsDate = dayjs(); // dayjs
const chronosDate = chronos(); // chronos

console.log(isDateLike(nativeDate)); // true
console.log(isDateLike(momentDate)); // true
console.log(isDateLike(luxonDate));  // true
console.log(isDateLike(dayjsDate));  // true
console.log(isDateLike(chronosDate));  // true
console.log(isDateLike('2023-01-01')); // false`}

Supported Libraries and Objects

The function recognizes these date-like objects:

Library	Detection Criteria
Native Date	instanceof Date
Chronos	Has format(), toJSON(), and toISOString() methods
Dayjs	Same as Chronos
Moment.js	Same as Chronos
Luxon	Has toISO(), toFormat() methods and isValid property
JS-Joda	Has plus(), minus(), equals(), and getClass() methods
Temporal	Has toJSON(), toString() and specific constructor names

API Reference

Function Signature

isDateLike(value: unknown): boolean;

Parameters

Parameter	Type	Description
value	unknown	The value to be checked

Returns

boolean - true if the value is a date-like object, false otherwise

Examples

Checking Different Value Types

import { DateTime } from 'luxon';
import { Temporal } from '@js-temporal/polyfill';

isDateLike(new Date()); // true
isDateLike(DateTime.now()); // true (Luxon)
isDateLike(Temporal.Now.instant()); // true
isDateLike({}); // false
isDateLike(null); // false
isDateLike('2023-01-01'); // false`}

Notes

• The function performs duck-typing for library objects rather than checking instanceof
• For maximum reliability with custom date objects, ensure they implement the expected methods
• Returns false for date strings - this only checks for date objects