javascript
Rush makes life easier for JavaScript developers who build and publish many packages from a common Git repo. If you're looking to break up your giant application into smaller pieces, and you already realized why it doesn't work to put each package in a separate repo... then Rush is for you!
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The huggingface_hub library allows you to interact with the Hugging Face Hub, a machine learning platform for creators and collaborators. Discover pre-trained models and datasets for your projects or play with the hundreds of machine learning apps hosted on the Hub. You can also create and share your own models and datasets with the community. The huggingface_hub library provides a simple way to do all these things with Python.
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In this short article, I will walk you through how I implemented it in Typescript (JS), how you can adopt MCP too and how it's going to make Agentic AI way simpler going forward.
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This open-source curriculum introduces the fundamentals of Model Context Protocol (MCP) through real-world, cross-language examples in .NET, Java, TypeScript, JavaScript, Rust and Python. Designed for developers, it focuses on practical techniques for building modular, scalable, and secure AI workflows from session setup to service orchestration.
View the source of this page for an example of how to implement a lightweight preview image for YouTube videos that is resilient to image load failures. There is no iframe on this page at load time. The iframe is only created when the user clicks the preview.
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a tool for transforming CSS with JavaScript.
PostCSS is a tool for transforming styles with JS plugins. These plugins can lint your CSS, support variables and mixins, transpile future CSS syntax, inline images, and more.
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Make ship happen. Turborepo is the build system for JavaScript and TypeScript codebases.
Build system optimized for JavaScript and TypeScript, written in Rust.
Static site search engine.
StaticSearch is a simple search engine you can add to any static website. It uses client-side JavaScript and JSON data files so there's no need for back-end server technologies or databases.
StaticSearch works with Publican but can be used on any static site built by any generator. It currently works best on English language sites, but most Western languages can be used.
The durable, distributed, and cloud-agnostic queue for Node.js.
Sidequest is a modern, scalable background job processor for Node.js applications. Built with TypeScript and designed for production use, it provides reliable job processing with multiple database backends, a beautiful web dashboard, and comprehensive monitoring capabilities.
Validate and visualize dependencies. Your rules. JavaScript, TypeScript, CoffeeScript. ES6, CommonJS, AMD.
The best dashboards are built with code. Create fast, beautiful data apps, dashboards, and reports from the command line. Write Markdown, JavaScript, SQL, Python, R… and any language you like. Free and open-source.
A static site generator for data apps, dashboards, reports, and more. Observable Framework combines JavaScript on the front-end for interactive graphics with any language on the back-end for data analysis.
Learn once, write anywhere. A framework for building native applications using React .
React Native brings React's declarative UI framework to iOS and Android. With React Native, you use native UI controls and have full access to the native platform.
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A lightweight JavaScript helper for automatically reloading the page when changes are detected in local files. Perfect for simple static sites.
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State-of-the-art JavaScript utility library.
A modern JavaScript utility library that's 2-3 times faster and up to 97% smaller—a major upgrade to lodash.
Very low overhead Node.js logger.
🌲 super fast, all natural json logger.
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Detect agentic coding environments and AI editors.
Detect agentic coding environments and AI assistant tools. This library allows CLI tools and Node apps to detect when they're being executed by AI agents. This enables them to adapt by, for example, providing different output formats or logs.
From an apprentice to a master of JavaScript.
Welcome to survivejs.com. I (Juho Vepsäläinen) have gathered material related to JavaScript since 2016. You can consider this site as a learning resource at different levels where I have gathered my learnings about the topic.
Javascript Language Plugin for PostreSQL.
PLJS is a trusted JavaScript Language Extension for PostgreSQL.
It is compact, lightweight, and fast.
Unobtrusive loggingfor modern JavaScript. Zero dependencies. Universal runtime. Optimized performance. Simple logging library with zero dependencies for Deno, Node.js, Bun, browsers, and edge functions.
LogTape is a logging library for JavaScript and TypeScript. It provides a simple and flexible logging system that is easy to use and easy to extend.
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Run JavaScript Everywhere.
Node.js® is a free, open-source, cross-platform JavaScript runtime environment that lets developers create servers, web apps, command line tools and scripts.
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- Performance and Stress Testing in Node.js @ AppSignal.
- Worker Threads in Node.js: A Complete Guide for Multithreading in JavaScript @ NodeSource.
- Modern Node.js Patterns for 2025 @ Ashwin's Blog.
- Everything You Need to Know About Node.js Type Stripping @ Marco's Blog.
- How we migrated our Rush.js monorepo to Node type stripping @ Calm.
A browser automation SDK built for developers and LLMs.
Most existing browser automation tools either require you to write low-level code in a framework like Selenium, Playwright, or Puppeteer, or use high-level agents that can be unpredictable in production. By letting developers choose what to write in code vs. natural language, Stagehand is the natural choice for browser automations in production.
An open source framework for building AI-powered apps with familiar code-centric patterns. Genkit makes it easy to develop, integrate, and test AI features with observability and evaluations. Genkit works with various models and platforms.
Genkit is an open-source framework for building full-stack AI-powered applications, built and used in production by Google's Firebase. It provides SDKs for multiple programming languages with varying levels of stability
Our Frontend Toolkit, Free and Open Source.
A collection of ready-to-use plugins and composables for building modern web applications. Unstyled, fully typed and with a flexible, yet opinionated API.
Tiny & fast S3 client for node and edge platforms.
s3mini is an ultra-lightweight Typescript client (~14 KB minified, ≈15 % more ops/s) for S3-compatible object storage. It runs on Node, Bun, Cloudflare Workers, and other edge platforms. It has been tested on Cloudflare R2, Backblaze B2, DigitalOcean Spaces, and MinIO. (No Browser support!)
JavaScript Library for Timezone Lookup by Location.
Fast, memory-efficient time zone estimations from latitude and longitude.
Create custom SQLite functions in JavaScript. Extend your database with scalars, aggregates, window functions, and collations directly in JavaScript.
SQLite-JS is a powerful extension that brings JavaScript capabilities to SQLite. With this extension, you can create custom SQLite functions, aggregates, window functions, and collation sequences using JavaScript code, allowing for flexible and powerful data manipulation directly within your SQLite database.
🔍 cli utility for querying the node_modules directory.
I often need to quickly check the versions of the modules installed in the node_modules directory. Current solutions like running npm list are slow and produce a lot of irrelevant output. Checking the version in the package.json file of the specific module requires more effort and doesn’t provide information about other instances of the same module.
qnm is a tool that solves this problem by providing fast and focused information about the installed modules. It supports both npm and yarn and allows you to quickly identify the versions of the modules you are interested in.
Play to create Games
A small javascript library that lets you code video games even without programming experience. Odyc.js is a tiny JavaScript library designed to create narrative games by combining pixels, sounds, text, and a bit of logic. Everything is built through code, but without unnecessary complexity: your entire game can fit in a single file.
Local-first data layer for high-performance apps. LiveStore is a next-generation state management framework based on reactive SQLite and git-inspired syncing (via event-sourcing).
LiveStore is a fully-featured, client-centric data layer (replacing libraries like Redux, MobX, etc.) with a reactive embedded SQLite database powered by real-time sync (via event-sourcing).
The library for web and native user interfaces.
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- JUST FUCKING USE REACT.
- Just Use React @ Epic React.
- Reactivity is easy @ romgrk.
- Level Up React: Deep dive into state and useState @ 56kode.
- The History of React Through Code @ Playful Programming.
- React Server Components: How We Got Here @ Epic React.
- The Useless useCallback @ TkDodo's blog.
- Let's Write React Hooks From Scratch @ Playful Programming.
- Unlocking Web Workers with React: A Step-by-Step Guide @ Rahul's Blog.
The Google Gen AI JavaScript SDK is designed for TypeScript and JavaScript developers to build applications powered by Gemini. The SDK supports both the Gemini Developer API and Vertex AI.
snapDOM captures HTML elements as images with exceptional speed and accuracy.
Defuddle extracts the main content from web pages. It cleans up web pages by removing clutter like comments, sidebars, headers, footers, and other non-essential elements, leaving only the primary content.
Extract Receipt & Invoice Data. Lightweight, customizable and open source.
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A faithful recreation of the classic Pokemon Red/Blue games built with React and TypeScript. This project aims to recreate the original Pokemon experience in the browser, maintaining the authentic feel while leveraging modern web technologies.
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Predictive Mouse Intent Library. What if we could only prefetch data the user actually needs?
ForesightJS is a JavaScript library that predicts user intent by tracking the mouse. Great for prefetching without wasting resources.
Nova is a JavaScript (ECMAScript) and WebAssembly engine written in Rust and following data-oriented design principles. It is currently nothing more than a fun experiment to learn and to prove the viability of such an engine, but may very well become something much more in the future.
Build PowerPoint presentations with JavaScript. Works with Node, React, web browsers, and more.
PptxGenJS lets you generate professional PowerPoint presentations in JavaScript - directly from Node, React, Vite, Electron, or even the browser. The library outputs standards-compliant Open Office XML (OOXML).
An explainer for doing web development using only vanilla techniques. No tools, no frameworks — just HTML, CSS, and JavaScript.
This is an overview of the major techniques used to make web sites and web applications without making use of build tools or frameworks, with just an editor, a browser, and web standards.
<html> as a Response.
mono-jsx is a JSX runtime that renders <html> element to Response object in JavaScript runtimes like Node.js, Deno, Bun, Cloudflare Workers, etc.
jscodeshift is a toolkit for building and running codemods over multiple JavaScript or TypeScript files.
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An open source, free (as in beer), versatile, flexible and lightweight Javascript Font Picker Component for System fonts, Google fonts and custom (woff/ttf) fonts. Features dynamic font loading, favourites, keyboard navigation, fuzzy search, advanced metrics filters, property sorting and much more. Available in multiple languages.
snapDOM captures DOM nodes as images with exceptional speed avoiding bottlenecks and long tasks.
snapDOM is a high-fidelity DOM capture tool, developed as part of the animation engine I'm developing for Zumly — a framework for creating smooth zoom-based view transitions.
The elegant bundler for libraries powered by Rolldown.
tsdown is The Elegant Library Bundler. Designed with simplicity and speed in mind, it provides a seamless and efficient way to bundle your TypeScript and JavaScript libraries. Whether you're building a small utility or a complex library, tsdown empowers you to focus on your code while it handles the bundling process with elegance.
An embeddable, lightweight, secure, high-performance JavaScript engine.
Hako is a embeddable, lightweight, secure, high-performance JavaScript engine. It is a fork of PrimJS; Hako has full support for ES2019 and later ESNext features, and offers superior performance and a better development experience when compared to QuickJS.
Fast and low overhead web framework, for Node.js.
Fastify is a web framework highly focused on providing the best developer experience with the least overhead and a powerful plugin architecture. It is inspired by Hapi and Express and as far as we know, it is one of the fastest web frameworks in town.
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Apache ECharts is a powerful, interactive charting and data visualization library for browser.
Apache ECharts is a free, powerful charting and visualization library offering easy ways to add intuitive, interactive, and highly customizable charts to your commercial products. It is written in pure JavaScript and based on zrender, which is a whole new lightweight canvas library.
A tool for preventing the installation of malicious PyPI and npm packages 🔥.
Supply-Chain Firewall is a command-line tool for preventing the installation of malicious PyPI and npm packages. It is intended primarily for use by engineers to protect their development workstations from compromise in a supply-chain attack.
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An open-source dataset of malicious software packages found in the wild, 100% vetted by humans.
This repository is an open-source dataset of 5938 malicious software packages (and counting) identified by Datadog, as part of our security research efforts in software supply-chain security. Most of the malicious packages have been identified by GuardDog.
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🐍 🔍 GuardDog is a CLI tool to Identify malicious PyPI and npm packages.
GuardDog is a CLI tool that allows to identify malicious PyPI and npm packages or Go modules. It runs a set of heuristics on the package source code (through Semgrep rules) and on the package metadata. GuardDog can be used to scan local or remote PyPI and npm packages or Go modules using any of the available heuristics.
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Next Generation Frontend Tooling.
Vite (French word for "quick", pronounced /vit/, like "veet") is a new breed of frontend build tooling that significantly improves the frontend development experience.
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Easy to use and powerful fuzzy string matching, port of fuzzywuzzy.
Mostly a JavaScript port of the TheFuzz (formerly fuzzywuzzy) Python library, with some additional features like token similarity sorting and wildcard support.
A JS library for predictable and maintainable global state management.
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Alibaba unified front-end form solution
📱🚀 🧩 Cross Device & High Performance Normal Form/Dynamic(JSON Schema) Form/Form Builder -- Support React/React Native/Vue 2/Vue 3.
In React, the whole tree rendering performance problem of the form is very obvious in the controlled mode. Especially for the scene of data linkage, it is easy to cause the page to be stuck. To solve this problem, we have distributed the management of the state of each form field, which significantly improves the performance of the form operations. At the same time, we deeply integrate the JSON Schema protocol to help you solve the problem of back-end driven form rendering quickly.
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A web-based ASCII and Unicode diagram builder written in vanilla Javascript.
Cascii is a web-based ASCII and Unicode diagram builder written in vanilla Javascript. It has zero dependencies on any servers, web packing, libraries, and is no-markup and no-stylesheets. You can start building diagrams by simply opening the cascii.html file in a browser. Cascii is also hosted at cascii.app where you can get short links to your diagrams, open an account, etc (see the Cascii server repo).