Lodash

_.defaults({ 'a': 1 }, { 'a': 3, 'b': 2 });// → { 'a': 1, 'b': 2 }_.partition([1, 2, 3, 4], n => n % 2);// → [[1, 3], [2, 4]]

Download

• Core build (~4kB gzipped)
• Full build (~24kB gzipped)
• CDN copies

Lodash is released under the MIT license & supports modern environments. Review the build differences & pick one that’s right for you.

Installation

In a browser:<script src="lodash.js"></script>

Using npm:$ npm i -g npm$ npm i --save lodash

In Node.js:// Load the full build.var _ = require('lodash');// Load the core build.var _ = require('lodash/core');// Load the FP build for immutable auto-curried iteratee-first data-last methods.var fp = require('lodash/fp'); // Load method categories.var array = require('lodash/array');var object = require('lodash/fp/object'); // Cherry-pick methods for smaller browserify/rollup/webpack bundles.var at = require('lodash/at');var curryN = require('lodash/fp/curryN');

Note:Install n_ for Lodash use in the Node.js < 6 REPL.

Why Lodash?

Lodash makes JavaScript easier by taking the hassle out of working with arrays, numbers, objects, strings, etc. Lodash’s modular methods are great for:

• Iterating arrays, objects, & strings
• Manipulating & testing values
• Creating composite functions

Module Formats

Lodash is available in a variety of builds & module formats.

• lodash & per method packages
• lodash-es, babel-plugin-lodash, & lodash-webpack-plugin
• lodash/fp
• lodash-amd

Complementary Tools

• futil-js is a set of functional utilities designed to complement lodash

Further Reading

• Contributing
• Release Notes
• Wiki (Changelog, Roadmap, etc.)

Support

Tested in Node.js 4+, Bun 1.0+, and the latest Chromium, Firefox, WebKit, and Edge via Playwright, with a best-effort commitment to support Chrome 74+, Firefox 66+, IE 11, Edge 18, and Safari 11+.