quick-lint-js

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.

const occupation = language + " coder";
const language = "JavaScript";
occupation = "Senior " + occupation;

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

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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	âœ	âœ	âœ	âœ	❌
license	free GPLv3	open source MIT	open source MIT	open source MIT	open source MIT
JSX	✠JSX	✠ â€  JSX	❌	✠JSX	âœ
TypeScript	✠TypeScript	✠ â€  TypeScript	❌	✠TypeScript	âœ
lint rules	minimal lint rules	zillions of lint rules	some	some lint rules	some
stable	âœ	âœ	âœ	âœ	âœ
feature	quick-lint-js	ESLint	JSHint	Biome	Deno
VS Code	âœ	âœ	âœ	âœ	âœ
Vim	âœ	âœ	âœ	âœ	âœ
Neovim	âœ	âœ	âœ	âœ	âœ
WebStorm	❌	âœ	âœ	âœ	âœ
Sublime Text	âœ	âœ	âœ	❌	âœ
Notepad++	❌	âœ	âœ	❌	❌
Emacs	âœ	âœ	âœ	❌	âœ
Codespaces	❌	❌	❌	❌	❌
Kate	âœ	❌	❌	❌	❌
LSP server	âœ	âœ	❌	âœ	âœ

Editor support

VS Code
Vim
Neovim
Sublime Text
Emacs
Kate