javascript
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.
Related contents:
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.
Related contents:
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.
Related contents:
- 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.
- The Risks of NPM @ Jim's Blog.
- Episode #111: npm under siege (what to do about it) @ Changelog & Friends.
- Node.js Performance: Processing 14GB Files 78% Faster with Buffer Optimization @ Peter Mbanugo.
- The Myths (and Costs) of Running Node.js on Kubernetes @ Platformatic.
- 15 Recent Node.js Features that Replace Popular npm Packages @ The NodeSource Blog.
- Improving the trustworthiness of Javascript on the Web @ Cloudflare.
- Rethinking async loops in JavaScript @ Matt Smith.
- Node.js 20+ memory management in containers @ RedHat Developers.
- Node.js vs Deno vs Bun Performance Benchmarks @ RepoFlow.
- We cut Node.js' Memory in half @ Platformatic.
- Node.js worker threads are problematic, but they work great for us @ Inngest.
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.
Related contents:
- 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.
- React Won by Default – And It's Killing Frontend Innovation @ Loren Stewart.
- React’s useTransition and state update reordering @ Jordan Eldredge.
- Cut styled-components into pieces: This is our last resort @ Sanity.
- You may be looking for a useSyncExternalStore @ swizec.com.
- Stop using .reverse().find(): meet findLast() @ Matt Smith.
- React <ViewTransition>: Smooth Animations Made Simple @ certificates.dev.
- The nuance of React rendering behaviour as it relates to children @ Black Sheep Code.
- Concurrent Hydration with useSyncExternalStore @ kurtextrem.
- Server and Client Component Composition in Practice @ Aurora Scharff.
- State-based vs Signal-based rendering @ Jovi De Croock.
- React Server Components: Do They Really Improve Performance? @ Developer Way.
- Using Atomic State to Improve React Performance in Deeply Nested Component Trees @ Harbor.
- Why startups choose React (and when you shouldn't) @ Evil Martians.
- dead framework theory @ AI Focus.
- Using Atomic State to Improve React Performance in Deeply Nested Component Trees @ Harbor.
- ChatGPT as My Coding Mentor: How I Learned React and Next.js as a Junior Developer @ iO tech_hub.
- Absolutely everything you need to know about act() in React tests @ HowToTestFrontend.
- Why use React? @ adactio.
- The next era of React has arrived: Here’s what you need to know @ LogRocket.
- React has finally solved its biggest problem: The joys of useEffectEvent @ LogRocket.
- useOptimistic Won't Save You @ Colum Kelly.
- Building Bulletproof React Components @ Shu Ding.
- Frontend Memory Leaks: A 500-Repository Static Analysis and Five-Scenario Benchmark Study @ StackInsight.
- Understanding Why React Fiber Exists @ Sanku.
- Start naming your useEffect functions, you will thank me later @ Neciu Dan.
- use(): The Hook That Breaks the Rules (On Purpose) @ Sascha Becker.
- I let React Compiler handle memoization: Here’s what actually broke @ LogRocket.
- React useOptimistic: Optimistic UI Patterns That Actually Work (2026) @ Carlos Oliva Pascual's dev.to.
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.
Related contents:
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.
Related contents:
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.
Related contents:
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.
Related contents:
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.
Powerful Workflow Automation Software & Tools.
Related contents:
- n8n -- Powerful automation for your homelab services @ Akash Rajpurohit.
- J'ai créé un Agent IA avec n8n pour automatiser tout mon blog 🧠 @ YoanDev's YouTube :fr:.
- 🚀 Automating Daily AWS Tasks with n8n and MCP: Building a Self-Healing Cloud @ AWS in Plain English's Medium.
- Self-hosted automation for EVERYTHING! // n8n Tutorial @ Chistian Lempa's YouTube.
- How to use AI to make Kubernetes monitoring smarter @ Danlio's Medium.
- My BEST N8N HomeLab automations (AI Agents…) @ Christian Lempa.
- n8n Tutorial – Zero to Hero Course @ freeCodeCamp.org's YouTube.
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.
Related contents:
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.
Related contents:
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.
Related contents:
🐍 🔍 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.
Related contents:
Actually Run Javascript Everywhere. Small and modular JavaScript runtime for desktop and mobile. Fast, Lightweight Runtime for Modular JavaScript Apps.
Small and modular JavaScript runtime for desktop and mobile. Like Node.js, it provides an asynchronous, event-driven architecture for writing applications in the lingua franca of modern software. Unlike Node.js, it makes embedding and cross-device support core use cases, aiming to run just as well on your phone as on your laptop. The result is a runtime ideal for networked, peer-to-peer applications that can run on a wide selection of hardware.
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.
Related contents:
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.
Related contents:
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.
Related contents:
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).
Related contents:
Become a better frontend developer.
Take your frontend skills to the next level by recreating real websites from real companies.
The perfect type of practice for developers of all skill levels. Are you up for the challenge?
JavaScript Canvas 2d Library.
Konva.js is an HTML5 Canvas JavaScript framework that extends the 2d context by enabling canvas interactivity for desktop and mobile applications.
Server-oriented customizable templating for JavaScript
hmpl is a small template language for displaying UI from server to client. It is based on customizable requests sent to the server via fetch and processed into ready-made HTML.
Related contents:
Interactive UI for local node modules inspection. Visualize your node_modules, inspect dependencies, and more.
An embeddable, scalable, extremely fast graph database.
Embeddable property graph database management system built for query speed and scalability. Implements Cypher. Kuzu is an embedded graph database built for query speed and scalability. Kuzu is optimized for handling complex analytical workloads on very large databases and provides a set of retrieval features, such as a full text search and vector indices. Our core feature set includes:
Related contents:
Empower the Web community and invite more to build across platforms.
Lynx is a family of open-source technologies empowering developers to use their existing web skills to create truly native UIs for both mobile and web from a single codebase, featuring performance at scale and velocity.
Related contents:
🏄 Framework-agnostic CSRF middleware for modern Node.js.
This middleware helps web developers fight CSRF attacks. Bear in mind, by solely using this middleware, we can't guarantee your app will be free from CSRF attacks. Refer to CSRF Prevention Cheat Sheet and pillarjs/understanding-csrf for more details.
Run JS when a CSS property changes. Any CSS property.
A robust, production-ready library to observe CSS property changes. Detects browser bugs and works around them, so you don't have to.
💩🚀 Windows 95 in Electron. Runs on macOS, Linux, and Windows. This is Windows 95, running in an Electron app. Yes, it's the full thing. I'm sorry.
Related contents:
Unite your modern frontend with your Laravel backend.
Fusion is the best way to combine your Laravel backend with your JavaScript frontend. We currently only support Vue.js, but React + Svelte are on the roadmap.
Related contents:
A lightweight, GDPR and CCPA compliant Consent Management Tool written in vanilla JS.
Related contents:
JSON Formatter, Validator & Viewer Online.
Effortlessly visualize JSON structures as interactive and dynamic tree diagrams.
jsontr.ee is a lightweight JavaScript library that transforms JSON data into beautifully rendered, interactive tree diagrams using SVG. Designed for simplicity and flexibility, it supports both arrays and nested objects, ensuring clear and intuitive visualizations of complex data structures.
Related contents:
Your one-stop hub for Nuxt and Vue development resources.
A productivity hub for Nuxt and Vue.js development - Snippets, AI commands, and more tools to enhance your workflow.
Related contents: