XO is an opinionated but configurable ESLint wrapper with lots of goodies included. It enforces strict and readable code. Never discuss code style on a pull request again! No decision-making. No eslint.config.js to manage. It just works!
It uses ESLint underneath.
This is free and open source software.
Key Features
- Beautiful output.
- Zero-config, but configurable when needed.
- Enforces readable code, because you read more code than you write.
- No need to specify file paths to lint as it lints all JS/TS files except for commonly ignored paths.
- Flat config customization.
- TypeScript supported by default.
- Includes many useful ESLint plugins, like unicorn, import, ava, n and more.
- Caches results between runs for much better performance.
- Super simple to add XO to a project with $ npm init xo.
- Fix many issues automagically with $ xo –fix.
- Open all files with errors at the correct line in your editor with $ xo –open.
- Specify indent and semicolon preferences easily without messing with the rule config.
- Optionally use the Prettier code style or turn off all Prettier rules with the compat option.
- Optionally use eslint-config-xo-react for easy JSX and React linting with zero config.
- Optionally use with ESLint directly
- Great editor plugins.
Website: github.com/xojs/xo
Support:
Developer: Sindre Sorhus
License: MIT License
XO is written in TypeScript. Learn TypeScript with our recommended free books and free tutorials.
Related Software
| JavaScript Linter Tools | |
|---|---|
| ESLint | Find and fix problems in JavaScript code |
| Biome | Toolchain for web projects |
| standard | JavaScript style guide, linter, and formatter |
| Flow | Static type checker |
| OXCc | Tools for JavaScript and TypeScript |
| XO | Configurable ESLint wrapper |
| JSHint | Static code analysis tool |
| Sherif | Checks monorepo dependency consistency |
| RSLint | Easy to use JavaScript and TypeScript linter |
| JSLint | JavaScript code quality and coverage tool |
| neostandard | Successor to the standardjs javascript style guide |
| deno_lint | Rust crate for building fast JavaScript and TypeScript linters |
| quick-lint-js | Finds bugs in JavaScript programs |
| Putout | JavaScript linter, pluggable and configurable code transformer |
Read our verdict in the software roundup.
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