JavaScript utility libraries

Find JavaScript utilities for dates, collections, identifiers, and everyday application tasks. Explore Lodash, date-fns, Moment.js, and more.

14 indexed packages. Inspect package specifications and compare alternatives according to their actual role in your application.

Packages in this category

date-fns: Modern JavaScript date utility library with a comprehensive toolset.
lodash: Lodash modular utilities.
dayjs: 2KB immutable date time library alternative to Moment.js with the same modern API
ramda: A practical functional library for JavaScript programmers.
lodash-es: Lodash exported as ES modules.
immer: Create your next immutable state by mutating the current one
nanoid: A tiny (117 bytes), secure URL-friendly unique string ID generator
es-toolkit: A state-of-the-art, high-performance JavaScript utility library with a small bundle size and strong type annotations.
Google Closure Library: Google's common JavaScript library
Underscore.js: JavaScript's functional programming helper library.
Modernizr: Modernizr is a JavaScript library that detects HTML5 and CSS3 features in the user’s browser.
Vue I18n: Internationalization plugin for Vue.js
React Helmet: A document head manager for React
Moment.js: Parse, validate, manipulate, and display dates

Identify the functions, locales, or date/time features you actually need.
Compare whole-package measurements with the documented modular import paths you plan to use.
Check whether required types and runtime requirements are declared in the chosen release.
For dates, review the maintainer’s timezone and locale guidance rather than assuming those features are built in.