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quick-lint-js finds bugs in JavaScript programs

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quick-lint-js

quick-lint-js finds bugs in JavaScript programs.

Warning: This is pre-release software. quick-lint-js is under active development and is unstable. Use at your own risk.

quick-lint-js finds many bugs, including:

  • Using a variable which does not exist
  • Assigning to a const variable
  • Using await in a non-async function
  • Syntax errors

Demonstration of quick-lint-js in Visual Studio Code

Installing

See installation instructions for how to install quick-lint-js' CLI, LSP server, and editor plugins.

See build instructions for how to build quick-lint-js for development.

Contact

IRC: ask questions in #quick-lint-js on freenode

Values

  • Performance. You use quick-lint-js in text editors and IDEs to show bugs as they are written. quick-lint-js must be fast to make feedback responsive.

    • Small design. The less infrastructure and developer conveniences used within quick-lint-js, the less time quick-lint-js wastes due to this bloat.
    • Few features. Features add run-time costs. With fewer features, quick-lint-js gives you feedback sooner.
  • High signal. quick-lint-js finds bugs, not nitpicks. You can use quick-lint-js in any project, no matter the size or style.

    • No opinions. quick-lint-js doesn't complain about style issues, like using 'strings' vs "strings". It complains about real bugs which everyone agrees are bugs.
    • No false positives. If quick-lint-js complains, you know it's a bug in your code.
    • No configuration. quick-lint-js works out-of-the-box. You don't need configuration files to tell quick-lint-js what buggy code looks like.

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quick-lint-js finds bugs in JavaScript programs

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