Andrey Sitnik
Author of PostCSS and Autoprefixer, Principal Frontend Engineer
Upcoming Events
Products
- PostCSS
PostCSS
One of the most popular and most depended-on npm libraries, PostCSS transforms CSS using an extensible plugins API. With more than 200 plugins, developers can lint CSS, support variables and mixins, transpile future CSS syntax, and more.
- Logux
Logux
A new way to connect clients and server. Instead of sending HTTP requests (AJAX/REST), it synchronizes the log of operations between client, server, and other clients through WebSockets.
Open source projects
- Browserslist
Browserslist
Defines and shares the list of target browsers between various frontend build tools.
- Size Limit
Size Limit
Linter for your JavaScript application that makes the Web lighter by preventing JS library bloat.
- OKLCH Color Picker & Converter
OKLCH Color Picker & Converter
OKLCH Color Picker & Converter helps designers and web developers pick and convert colors in OKLCH and LCH color space, enhance a11y in their projects, and prepare for a future with a vibrant P3 color space.
- Evil Blocks
Evil Blocks
A tiny JavaScript framework for web pages designed to split your app to separated blocks.
- Visibility.js
Visibility.js
A JavaScript library that can detect if a browser tab is currently active for a user.
- Nano Stores
Nano Stores
A tiny state manager for React, React Native, Preact, Vue, Svelte, Solid, Lit, Angular, and vanilla JS.
- Check TypeScript Definitions
Check TypeScript Definitions
Unit tests for TypeScript definitions in your JavaScript open source library.
Posts
- PostCSS creator shares how to make your open source popular
PostCSS creator shares how to make your open source popular
![Cover for PostCSS creator shares how to make your open source popular]()
- How to make web videos way smaller in 2025 using the AV1 codec
How to make web videos way smaller in 2025 using the AV1 codec
![Cover for How to make web videos way smaller in 2025 using the AV1 codec]()
- How to Favicon in 2025: Three files that fit most needs
How to Favicon in 2025: Three files that fit most needs
![Cover for How to Favicon in 2025: Three files that fit most needs]()
- Recapping the first Local‑First conference in 15 minutes
Recapping the first Local‑First conference in 15 minutes
![Cover for Recapping the first Local‑First conference in 15 minutes]()
- Collaborative real-time security: Logux for Akeero
Collaborative real-time security: Logux for Akeero
![Cover for Collaborative real-time security: Logux for Akeero]()
- What I learned as a developer from accidents in space
What I learned as a developer from accidents in space
![Cover for What I learned as a developer from accidents in space]()
- New home for Logux: Pouring love into an OSS documentation website
New home for Logux: Pouring love into an OSS documentation website
![Cover for New home for Logux: Pouring love into an OSS documentation website]()
- Faster WebGL/Three.js 3D graphics with OffscreenCanvas and Web Workers
Faster WebGL/Three.js 3D graphics with OffscreenCanvas and Web Workers
Past events
- Andrey Sitnik from Talks with Ido Evergreen
Andrey Sitnik from Talks with Ido Evergreen
Talks with Ido Evergreen - How to Make Your Open Source Project Popular
How to Make Your Open Source Project Popular
OpenSouthCode - How to make your open source project popular
How to make your open source project popular
Upstream 2024![Cover for How to make your open source project popular]()
- How to Make Your Open Source Project Popular
How to Make Your Open Source Project Popular
Open Source Day 2024 - What I learned as a developer from accidents in space
What I learned as a developer from accidents in space
Hacktoberfest Barcelona - What I learned as a developer from accidents in space
What I learned as a developer from accidents in space
WeAreDevelopers World Congress 2023 - Andrey Sitnik from Evil Martians for Devtools FM
Andrey Sitnik from Evil Martians for Devtools FM
Devtools FM![Cover for Andrey Sitnik from Evil Martians for Devtools FM]()
- Why OKLCH is the future of colors in CSS
Why OKLCH is the future of colors in CSS
Adevinta FrontendDay - CRDT and other new ideas for client-server communication
CRDT and other new ideas for client-server communication
DevBcn - What I learned as a developer from accidents in space
What I learned as a developer from accidents in space
BarcelonaJS - Season 1, Episode 1: Building communities around products
Season 1, Episode 1: Building communities around products
Dev Propulsion Labs![Cover for Season 1, Episode 1: Building communities around products]()
- Future of colors in CSS: why I moved to oklch() from rgb(), hex, and hsl()
Future of colors in CSS: why I moved to oklch() from rgb(), hex, and hsl()
BarcelonaJS - What developers can learn from Soviet space program failures
What developers can learn from Soviet space program failures
HalfStack - Globalization tools—the state of the Web
Globalization tools—the state of the Web
Google Chrome Developers - What developers can learn from Soviet space program failures
What developers can learn from Soviet space program failures
NodeFest - CRDT: Conflict-free Data Types for collaborative editing and offline-first
CRDT: Conflict-free Data Types for collaborative editing and offline-first
BrooklynJS - CRDT and other new ideas for client-server communication
CRDT and other new ideas for client-server communication
ThunderPlains - CRDT and other new ideas for client-server communication
CRDT and other new ideas for client-server communication
VueConf - CRDT and other new ideas for client-server communication
CRDT and other new ideas for client-server communication
EmpireJS - MargieMap / Mad Russian scientist / Serverless server
MargieMap / Mad Russian scientist / Serverless server
TalkScriptFM![Cover for MargieMap / Mad Russian scientist / Serverless server]()
- CRDT: Conflict-free Data Types for collaborative editing and Offline-first
CRDT: Conflict-free Data Types for collaborative editing and Offline-first
NeJS Conf - What developers can learn from Soviet space program failures
What developers can learn from Soviet space program failures
ManhattanJS - CRDT and other new ideas for client-server communication
CRDT and other new ideas for client-server communication
Porto Tech Hub - Logux, a new approach to client-server communication
Logux, a new approach to client-server communication
React Summit - Robots must suffer: linters and tools for frontend development
Robots must suffer: linters and tools for frontend development
FEday - Logux, a new way of client-server conversation
Logux, a new way of client-server conversation
React London
