Have you used utility libraries for working with dates? What are the alternatives you know?

Yes, utility libraries are often used in JavaScript for working with dates, simplifying parsing, formatting, calculations, and timezone handling.

The main ones include:

• Moment.js — one of the most popular libraries, although now considered deprecated and not recommended for new projects due to its size and lack of support for modern standards.

• date-fns — a modern, modular library with functions for date operations, supporting tree-shaking to reduce the final bundle size.

• Day.js — a lightweight alternative to Moment.js with a similar API but smaller size.

• Luxon — a library from the creators of Moment.js, supporting timezone and localization, utilizing modern JavaScript features.

Example of using date-fns:

import { format, addDays, parseISO } from 'date-fns';

const date = parseISO('2024-06-01');
const newDate = addDays(date, 10);
console.log(format(newDate, 'yyyy-MM-dd')); // 2024-06-11

The choice of library depends on project requirements, localization support, size, and functionality.