JavaScript - Linting and code style

xo - JavaScript happiness style linter

A screenshot of several JavaScript linting errors.

Opinionated but configurable ESLint wrapper with lots of goodies included. Enforces strict and readable code. Never discuss code style on a pull request again! No decision-making. No .eslintrc or .jshintrc to manage. It just works!

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Highlights

  • 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 files except for commonly ignored paths.
  • Config overrides per files/globs. (ESLint doesn’t support this)
  • Includes many useful ESLint plugins, like unicorn, import, ava, and more.
  • Caches results between runs for much better performance.
  • Super simple to add XO to a project with $ xo --init.
  • 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.
  • Great editor plugins.