quick-lint-js

Find bugs in JavaScript programs.

Over 90× faster than ESLint, quick-lint-js gives you instant feedback as you code. Find bugs in your JavaScript before your finger leaves the keyboard. Lint any JavaScript file with no configuration.

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AwesomeApp.js ✕• 
const occupation = language + " coder";
const language = "JavaScript";
occupation = "Senior " + occupation;

E0057 - use of undeclared variable: ocupationconsole.log(`Welcome, ${ocupationoccupation}!`);
2 10
JavaScript

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Install quick-lint-js

Latest version: 2.18.0 (released )

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Features

feature quick-lint-js ESLint JSHint Biome Deno
speed 🚀 quick 🐇
capable 		🐢
slow 		🚀
quick 		🐢
slow
easy setup ✅
zero config 		❌
config or init 		❌
config 		✅
config optional 		✅
zero config
easy npm install ✅ ✅ ✅ ✅ ❌
license free
GPLv3		 open source
MIT		 open source
MIT		 open source
MIT		 open source
MIT
JSX ✅
JSX 		✅ †
JSX 		❌ ✅
JSX 		✅
TypeScript ✅ *
TypeScript 		✅ †
TypeScript 		❌ ✅
TypeScript 		✅
lint rules minimal
lint rules 		zillions
of lint rules 		some some
lint rules 		some
stable ✅ ✅ ✅ ✅ ✅
feature quick-lint-js ESLint JSHint Biome Deno
VS Code ✅ ✅ ✅ ✅ ✅
Vim ✅ ✅ ✅ ✅ ✅
Neovim ✅ ✅ ✅ ✅ ✅
WebStorm ❌ ✅ ✅ ✅ ✅
Sublime Text ✅ ✅ ✅ ❌ ✅
Notepad++ ❌ ✅ ✅ ❌ ❌
Emacs ✅ ✅ ✅ ❌ ✅
Codespaces ❌ ❌ ❌ ❌ ❌
Kate ✅ ❌ ❌ ❌ ❌
LSP server ✅ ✅ ❌ ✅ ✅

* feature is experimental

† feature requires a plugin

Editor support