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JavaScript's functional programming helper library.
Updated 21 days ago by @jashkenas
Parse and stringify URL query strings
Updated March 18, 2021 by @sindresorhus
JavaScript library for DOM operations
Updated March 2, 2021 by @scott.gonzalez
Open stuff like URLs, files, executables. Cross-platform.
Updated 9 days ago by @sindresorhus
Node.js Buffer API, for the browser
Updated November 23, 2020 by @feross
Universal WHATWG Fetch API for Node, Browsers and React Native
Updated April 2, 2021 by @lquixada
Minimal lightweight logging for JavaScript, adding reliable log level methods to any available console.log methods
Updated November 25, 2020 by @pimterry
ES2015 `Object.assign()` ponyfill
Updated March 21, 2018 by @gaearon
Browser-friendly inheritance fully compatible with standard node.js inherits()
Updated June 19, 2019 by @isaacs
Lightweight JavaScript-based user-agent string parser
Updated 26 days ago by @faisalman
Decode JWT tokens, mostly useful for browser applications.
Updated 15 days ago by @sergii.biienko
The assert module from Node.js, for the browser.
Updated April 9, 2020 by @ahdinosaur
browser-side require() the node way
Updated October 10, 2020 by @raynos
HTML enhanced for web apps
Updated December 15, 2020 by @angularcore
A simple, lightweight JavaScript API for handling cookies
Updated March 30, 2021 by @carhartl
tap-producing test harness for node and browsers
Updated March 3, 2021 by @domenic
watch mode for browserify builds
Updated January 28, 2021 by @substack
Mac OS X Plist parser/builder for Node.js and browsers
Updated March 26, 2021 by @mreinstein
Convert a typed array to a Buffer without a copy
(recursive)? merging of (cloned)? objects.
Updated February 22, 2021 by @yeikos
Array#isArray for older browsers
Updated July 8, 2019 by @juliangruber
The string_decoder module from Node core
Updated August 7, 2019 by @cwmma
The Node.js `util.deprecate()` function with browser support
Updated June 14, 2017 by @tootallnate
atob for Node.JS and Linux / Mac / Windows CLI (it's a one-liner)
Updated August 18, 2018 by @coolaj86
Extends Chai with assertions for the Sinon.JS mocking framework.
Updated March 23, 2021 by @domenic