JSPM

A robust, ES3 compatible, "has own property" predicate.

A simple cache for a few of the JS Error constructors.

sortlab is a versatile sorting package that supports various data structures, such as number arrays and strings, and provides multiple popular sorting algorithms. 💪

Gets the description of a Symbol. Handles `Symbol()` vs `Symbol('')` properly when possible.

ES2019 spec-compliant String.prototype.trimEnd shim.

A parser that converts TypeScript source code into an ESTree compatible form

Unbox a boxed JS primitive value.

Set a function's length property

The fastest directory crawler & globbing alternative to glob, fast-glob, & tiny-glob. Crawls 1m files in < 1s

Is this value a JS SharedArrayBuffer?

Which kind of boxed JS primitive is this?

Is this value a JS ArrayBuffer?

An ESLint custom parser which leverages TypeScript ESTree

ES spec-compliant shim for ArrayBuffer.prototype.slice

TypeScript is a language for application scale JavaScript development

Is this an arguments object? It's a harder question than you think.

An AST-based pattern checker for JavaScript.

JavaScript parser, mangler/compressor and beautifier toolkit for ES6+

An Esprima-compatible JavaScript parser built on Acorn

An ESnext spec-compliant `Object.groupBy` shim/polyfill/replacement that works as far down as ES3.

An ESnext spec-compliant `Array.prototype.toSorted` shim/polyfill/replacement that works as far down as ES3.

`Iterator.prototype`, or a shared object to use.

An ESnext spec-compliant iterator helpers shim/polyfill/replacement that works as far down as ES3.

TypeScript ORM for Node.js based on Data Mapper, Unit of Work and Identity Map patterns. Supports MongoDB, MySQL, PostgreSQL and SQLite databases as well as usage with vanilla JavaScript.

Publish-subscribe data structures for JavaScript

Modern TypeScript JSON diff library - Zero dependencies, high performance, ESM + CommonJS support. Calculate and apply differences between JSON objects with advanced features like key-based array diffing, JSONPath support, and atomic changesets.

Library that allow you to describe data structures by subset of JavaScript syntax and validate them at runtime

TypeScript ORM for Node.js based on Data Mapper, Unit of Work and Identity Map patterns. Supports MongoDB, MySQL, PostgreSQL and SQLite databases as well as usage with vanilla JavaScript.

Standard AVL tree

TypeScript ORM for Node.js based on Data Mapper, Unit of Work and Identity Map patterns. Supports MongoDB, MySQL, PostgreSQL and SQLite databases as well as usage with vanilla JavaScript.

An efficient JavaScript package for implementing and working with Circular Queue data structures.

Tooling which enables you to use TypeScript with ESLint

TypeScript ORM for Node.js based on Data Mapper, Unit of Work and Identity Map patterns. Supports MongoDB, MySQL, PostgreSQL and SQLite databases as well as usage with vanilla JavaScript.

writing HTML templates as Javascript data structures

Javascript data structures library

A pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module.

Algorithms and data structures

Serialize JavaScript to a superset of JSON that includes regular expressions and functions.

Directed Graph

A lightweight carousel library with fluid motion and great swipe precision

A lightweight carousel library with fluid motion and great swipe precision

A collection of common interactive command line user interfaces.

Reactive utilities for Embla Carousel

Generates CRC hashes for strings - for use by node redis clients to determine key slots.

TypeScript ORM for Node.js based on Data Mapper, Unit of Work and Identity Map patterns. Supports MongoDB, MySQL, PostgreSQL and SQLite databases as well as usage with vanilla JavaScript.

A query library for ECMAScript AST using a CSS selector like query language.

TypeScript ORM for Node.js based on Data Mapper, Unit of Work and Identity Map patterns. Supports MongoDB, MySQL, PostgreSQL and SQLite databases as well as usage with vanilla JavaScript.

Check if something can be an ecmascript (javascript) identifier name

Use JavaScript to implement some data structures and algorithms

Stylish, intuitive and user-friendly prompt system. Fast and lightweight enough for small projects, powerful and extensible enough for the most advanced use cases.

An **EXPERIMENTAL** Webpack plugin to enable "Fast Refresh" (also previously known as _Hot Reloading_) for React components.

Airbnb's base JS ESLint config, following our styleguide

Inquirer prompts, combined in a single package

ESLint JavaScript language implementation

WebAssembly binary format parser

Parses CSS inline style to JavaScript object (camelCased).

A collection of implementation for ECMAScript abstract operations

Spectacular Test Runner for JavaScript.

Polyfills the ResizeObserver API and supports box size options from the latest spec

Listen to realtime updates to your PostgreSQL database

Runtime library for TypeScript helper functions

Trie, prefix tree

A less than 1KB css-in-js solution

regexpu’s core functionality (i.e. `rewritePattern(pattern, flag)`), capable of translating ES6 Unicode regular expressions to ES5.

remark plugin to support MDX syntax

ECMAScript extensions and shims

JS type check (TypeScript supported) functions like `isPlainObject() isArray()` etc. A simple & small integration.

esast (and estree) utility to visit nodes

Inquirer checkbox prompt

unist utility to get a position from an estree node

micromark extension to support MDX or MDX JS expressions

micromark extension to support MDX JS import/exports

Graph data structure.

Seeder package for MikroORM.

Airbnb's ESLint config with TypeScript support

ES spec-compliant shim for TypedArray.prototype.slice

Find and fix unused dependencies, exports and files in your TypeScript and JavaScript projects

Publish multiple editions for your JavaScript packages consistently and easily (e.g. source edition, esnext edition, es2015 edition)

Transform JSX in estrees to function calls (for react, preact, and most hyperscript interfaces)

Attach comments to estree nodes

A Reactive State Management Tailored-Made for JS Applications

Microsoft Azure Storage SDK for JavaScript - Blob

`AsyncIterator.prototype`, or a shared object to use.

JavaScript SVG parser and renderer on Canvas.

TypeScript ORM for Node.js based on Data Mapper, Unit of Work and Identity Map patterns. Supports MongoDB, MySQL, PostgreSQL and SQLite databases as well as usage with vanilla JavaScript.

Isomorphic storage client for Supabase.

Use the :focus-visible pseudo-selector in CSS

JavaScript 3D library

Inquirer confirm prompt

Highly configurable, well-tested, JavaScript-based HTML minifier.

A pure javascript JPEG encoder and decoder

A JavaScript parser

Stringify is to `eval` as `JSON.stringify` is to `JSON.parse`

ECMAScript 5 compatibility shims for legacy JavaScript engines

TypeScript ORM for Node.js based on Data Mapper, Unit of Work and Identity Map patterns. Supports MongoDB, MySQL, PostgreSQL and SQLite databases as well as usage with vanilla JavaScript.

A powerful and lightweight inversion of control container for JavaScript and Node.js apps powered by TypeScript.

JavaScript utilities with respect to emerging standard

An ESnext spec-compliant `Array.prototype.toReversed` shim/polyfill/replacement that works as far down as ES3.

Carbon Charts component library

micromark extension to support MDX or MDX.js JSX

Is the value an object or an array but not null?

Create and modify PDF files with JavaScript

Lightweight and performant natural sorting of arrays and collections by differentiating between unicode characters, numbers, dates, etc.

Inquirer checkbox prompt

Parses JavaScript objects into XML

Inquirer select/list prompt

Inquirer rawlist prompt

Inquirer password prompt

A JavaScript text diff implementation.

Jspreadsheet is a lightweight, vanilla javascript plugin to create amazing web-based interactive data grids with spreadsheet like controls compatible with Excel, Google Spreadsheets and any other spreadsheet software.

Check what’s defined in an estree scope

Inquirer input text prompt

esast utility to transform from estree

ECMAScript parsing infrastructure for multipurpose analysis

A pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module.

prelude.ls is a functionally oriented utility library. It is powerful and flexible. Almost all of its functions are curried. It is written in, and is the recommended base library for, LiveScript.

Edit a string with the users preferred text editor using $VISUAL or $ENVIRONMENT

recma plugin to add support for parsing and serializing JSX

recma plugin to add support for parsing and serializing JSX

Detects the JavaScript libraries running on a page

List of getter/setter properties for JavaScript types

recma plugin to serialize JavaScript

recma plugin to transform HTML (hast) to JS (estree)

recma plugin to parse JavaScript

List of properties for JavaScript objects

List of JavaScript types

hast utility to transform to estree (JavaScript AST) JSX

vanilla javascript input mask

TypeScript ORM for Node.js based on Data Mapper, Unit of Work and Identity Map patterns. Supports MongoDB, MySQL, PostgreSQL and SQLite databases as well as usage with vanilla JavaScript.

Common data structures created in Javascript

Returns true if an object was created by the `Object` constructor, or Object.create(null).

Standard data structure

CloudEvents SDK for JavaScript

Tweak React components in real time.

Javascript Redis protocol (RESP) parser

TypeScript ORM for Node.js based on Data Mapper, Unit of Work and Identity Map patterns. Supports MongoDB, MySQL, PostgreSQL and SQLite databases as well as usage with vanilla JavaScript.

An autoplay plugin for Embla Carousel

There are neither a lot of resources on internet nor any book which guides and dictates best practices in the implementation of popular Data Structures using Javascript. The purpose of this library is to provide cooked implementation of populare data stru

Style elements relative to other elements in CSS

Fast, small, efficient JavaScript memoization lib to memoize JS functions

Style form elements when they are empty

[](https://www.npmjs.com/package/yamux-js) [](https://github.com/th-ch/yamux-js) [![GitHub

Heap

Feature-rich JavaScript Spreadsheet (Excel) control with built-in support for selection, editing, formatting, importing and exporting to Excel

A lightweight, powerful javascript datetime picker

ModderSecure SDK for secure data and backend encryption and decryption. Provides robust AES-256 GCM encryption, secure key management, and premium features for enhanced API security and data privacy.

JavaScript Testing utilities for React

JavaScript Testing utilities for React

Some JavaScript and TypeScript implementation of a graph data structure. Features: - Insert and remove nodes. - Connect and disconnect nodes. - Algorithms for graph structures.

Promptbook: Run AI apps in plain human language across multiple models and platforms

An ESnext spec-compliant shim/polyfill/replacement for all Well-Known Symbols that works in any environment with Symbols.

JavaScript diagramming library

Classify GPU's based on their benchmark score in order to provide an adaptive experience.

Comprehensive TypeScript/JavaScript utility library with cross-environment support (Node.js, browser, web worker) providing helper functions, polyfills (ES5-ES2023), type checking utilities, and optimized implementations for better minification and code r

Binary Tree. Javascript & Typescript Data Structure.

WebAssembly text format printer

JavaScript parser, mangler/compressor and beautifier toolkit

OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

AST utils for webassemblyjs

Fast document oriented javascript in-memory database

Generate JavaScript-compatible regular expressions based on a given set of Unicode symbols or code points.

Share server-side state with the client-side of an Express app via JavaScript.

A JavaScript plugin for entering and validating international telephone numbers

Isomorphic Javascript client for Supabase

Fast SublimeText-like fuzzy search for JavaScript

Returns true if any values exist, false if empty. Works for booleans, functions, numbers, strings, nulls, objects and arrays.

Highly customizable notification snackbars (toasts) that can be stacked on top of each other

Node.js library for Portable Executable format

JavaScript client with TypeScript support for the People Data Labs API

declarative immutable-ish data structures

Official React component for Font Awesome

support for asynchronous development with a Promise based task Scheduler, several different Promise implementations (synchronous, idle, asynchronous and native runtime wrappers), await helpers, and aliases all built and tested using TypeScript.

Airbnb's ESLint config, following our styleguide

Lottie and DotLottie player for the web

Inquirer core TS types

A collection of mostly common algorithms, data structures with visualizations and explanations.

🚀 The OpenAPI to TypeScript codegen. Generate clients, SDKs, validators, and more.

TypeScript Data Structures that you need!

Flow types for the Javascript AST

The most popular library of interactive components built with Tailwind CSS

JavaScript library for DOM operations

Generate a table of contents based on the heading structure of a html document.

This package provides the core functions to define the data models

Polyfill for Metadata Reflection API

ArcGIS Maps SDK for JavaScript: A complete 2D and 3D mapping and data visualization API

TypeScript ORM for Node.js based on Data Mapper, Unit of Work and Identity Map patterns. Supports MongoDB, MySQL, PostgreSQL and SQLite databases as well as usage with vanilla JavaScript.

Base driver class for Appium drivers

Core Inquirer prompt API

A react component to format phone numbers

The Maps component is used to visualize the geographical data and represent the statistical data of a particular geographical area on earth with user interactivity, and provides various customizing options

A fade plugin for Embla Carousel

Low-Level OAuth 2 / OpenID Connect Client API for JavaScript Runtimes

Escape strings for use as JavaScript string literals

TypeScript shorties for the web

Microsoft Azure SDK for JavaScript - Aborter

Javascript function that triggers browser to save javascript-generated content to a file

Lightweight dependency injection container for JavaScript/TypeScript

Vendored version of figures, for CJS compatibility

An API documentation generator for JavaScript.

Priority Queue

ECMAScript6 WeakMap polyfill

Generated GraphQL types based on the GraphQL API schemas

Deque

Utilities to get and check variable types (isString, isPlainObject, isRegExp, etc)

Data model for commercetools platform common types

The base plugin used to create Appium plugins

Automation for Apps.

Validate and visualize dependencies. With your rules. JavaScript, TypeScript, CoffeeScript. ES6, CommonJS, AMD.

Data model for commercetools platform common types

Data model for commercetools API Type

PDF file parser that converts PDF binaries to JSON and text, powered by porting a fork of PDF.JS to Node.js

Check which JavaScript environment your code is running in at runtime: browser, Node.js, Bun, etc

Broccoli plugin that allows you to filter files selected from an input node down based on regular expressions.

No-dependencies, low-level, high-performance JIT code generation package for JavaScript

Data model for commercetools API Category

React wrapper around the dotlottie-web library

InversifyJs core package

Manage unstructured data using DataSet. Add, update, and remove data, and listen for changes in the data.

Data model for commercetools API Customer Group

simple scope analysis for javascript ASTs

Data model for commercetools API Customer

Interact with and control an embedded Vimeo Player.

Determine whether an AST node is a reference

Rewrite element with rehype.

browser-side require() the node way

InversifyJs common utils

The HTML touch slider carousel with the most native feeling you will get.

The modern CSS-in-JS library

Use SQL to select and filter javascript data - including relational joins and search in nested objects (JSON). Export to and import from Excel and CSV

JavaScript Testing utilities for React

Tree Multimap

Persistent storage for Appium extensions

Data model for commercetools API ProductDiscount

Universal JavaScript SDK for Storyblok's API

Essential JS 2 TreeMap Components

Support libs used across Appium packages

Data model for commercetools API ProductType

Documentation generation utilities for Appium and related projects

Simulate react-select events for react-testing-library

Reflect metadata utils

Merge objects & other types recursively. A simple & small integration.

New syntax to add attributes to Markdown.

Pact for all things Javascript

JavaScript telemetry tooling for open/inner source projects

A programmatic interface for jsdoc

Easily create highly customizable particle, confetti and fireworks animations and use them as animated backgrounds for your website. Ready to use components available also for React, Vue.js (2.x and 3.x), Angular, Svelte, jQuery, Preact, Riot.js, Inferno.

Error classes used in node_redis

Inquirer search prompt

Inquirer number prompt